diff --git a/public/dimensional_analysis.py b/public/dimensional_analysis.py
index a5eac9b3..5396a201 100644
--- a/public/dimensional_analysis.py
+++ b/public/dimensional_analysis.py
@@ -63,7 +63,8 @@
     ceiling,
     sign,
     sqrt,
-    factorial
+    factorial,
+    summation
 )
 
 class ExprWithAssumptions(Expr):
@@ -1124,32 +1125,19 @@ def UniversalInverse(expression: Expr) -> Expr:
 
 def IndexMatrix(expression: Expr, i: Expr, j: Expr) -> Expr:
     for subscript in cast(list[ExprWithAssumptions], (i,j)):
-        if not (subscript.is_real and subscript.is_finite and subscript.is_integer and cast(int, subscript) > 0):
-            raise Exception("Matrix indices must evaluate to a finite real integer and be greater than 0")
+        if subscript.is_real and cast(int, subscript) <= 0:
+            raise Exception("Matrix indices must be greater than 0")
         
     return expression[i-1, j-1] # type: ignore
 
-class CustomFactorial(Function):
-    is_real = True
 
-    @staticmethod
-    def _imp_(arg1: float):
-        if arg1.is_integer() and arg1 >= 0.0:
-            return math.factorial(int(arg1))
-        else:
-            raise ValueError("The factorial function can only be evaluated on a nonnegative integer")
-
-    def _eval_evalf(self, prec):
-        if self.args[0].is_number:
-            if not (self.args[0].is_real and
-                    cast(ExprWithAssumptions, self.args[0]).is_finite and
-                    cast(ExprWithAssumptions, self.args[0]).is_integer and
-                    cast(int, self.args[0]) >= 0):
-                raise ValueError("The factorial function can only be evaluated on a nonnegative integer")
-            return factorial(self.args[0])._eval_evalf(prec) # type: ignore
+def _factorial_imp_(arg1: float):
+    if arg1.is_integer() and arg1 >= 0.0:
+        return math.factorial(int(arg1))
+    else:
+        raise ValueError("The factorial function can only be evaluated on a nonnegative integer")
 
-    def _latex(self, printer):
-        return rf"\left({printer._print(self.args[0])}\right)!"
+factorial._imp_ = staticmethod(_factorial_imp_) # type: ignore
 
 def custom_norm(expression: Matrix):
     return expression.norm()
@@ -1185,6 +1173,8 @@ def custom_integral_dims(local_expr: Expr, global_expr: Expr, dummy_integral_var
     else:
         return global_expr * integral_var # type: ignore
 
+def custom_summation(operand: Expr, dummy_var: Symbol, start: Expr, end: Expr):
+    return summation(operand, (dummy_var, start, end))
 
 CP = None
 
@@ -1493,7 +1483,8 @@ def get_next_id(self):
     cast(Function, Function('_Derivative')) : {"dim_func": custom_derivative_dims, "sympy_func": custom_derivative},
     cast(Function, Function('_Integral')) : {"dim_func": custom_integral_dims, "sympy_func": custom_integral},
     cast(Function, Function('_range')) : {"dim_func": custom_range, "sympy_func": custom_range},
-    cast(Function, Function('_factorial')) : {"dim_func": factorial, "sympy_func": CustomFactorial},
+    cast(Function, Function('_factorial')) : {"dim_func": factorial, "sympy_func": factorial},
+    cast(Function, Function('_summation')) : {"dim_func": custom_summation, "sympy_func": custom_summation},
 }
 
 global_placeholder_set = set(global_placeholder_map.keys())
diff --git a/src/constants.ts b/src/constants.ts
index ed8898fc..183ca20d 100644
--- a/src/constants.ts
+++ b/src/constants.ts
@@ -6,6 +6,8 @@ export const INLINE_SHORTCUTS = {
     '~': '\\approx',
     'sqrt': '\\sqrt{#?}',
     '$int': '\\int _{#?}^{#?}\\left(#?\\right)\\mathrm{d}\\left(#?\\right)',
+    '$inf': '\\infty',
+    '$sum': '\\sum_{#?=#?}^{#?}\\left(#?\\right)',
     '$prime': '\\frac{\\mathrm{d}}{\\mathrm{d}\\left(#?\\right)}\\left(#?\\right)',
     '$doubleprime': '\\frac{\\mathrm{d}^{2}}{\\mathrm{d}\\left(#?\\right)^{2}}\\left(#?\\right)',
     '$tripleprime': '\\frac{\\mathrm{d}^{3}}{\\mathrm{d}\\left(#?\\right)^{3}}\\left(#?\\right)',
diff --git a/src/parser/LatexLexer.g4 b/src/parser/LatexLexer.g4
index 35f91306..a7cd66da 100644
--- a/src/parser/LatexLexer.g4
+++ b/src/parser/LatexLexer.g4
@@ -16,14 +16,24 @@ DOUBLE_VBAR: '||' | '\\Vert' ;
 
 UNDERSCORE: '_' ;
 
+fragment
+UNDERSCORE_SINGLE_CHAR_NUMBER: '_' [0-9];
+
+fragment
+UNDERSCORE_SINGLE_CHAR_ID: '_' [a-zA-Z];
+
 EXCLAMATION: '!' ;
 
 PI: '\\pi' ;
 
+INFINITY: '\\infty' ;
+
 CMD_INT: '\\int' ;
 CMD_INT_UNDERSCORE: '\\int' [ ]* '_' ;
-CMD_INT_UNDERSCORE_SINGLE_CHAR_NUMBER: '\\int' [ ]* '_' [0-9];
-CMD_INT_UNDERSCORE_SINGLE_CHAR_ID: '\\int' [ ]* '_' [a-zA-Z] ;
+CMD_INT_UNDERSCORE_SINGLE_CHAR_NUMBER: '\\int' [ ]* UNDERSCORE_SINGLE_CHAR_NUMBER ;
+CMD_INT_UNDERSCORE_SINGLE_CHAR_ID: '\\int' [ ]* UNDERSCORE_SINGLE_CHAR_ID ;
+
+CMD_SUM_UNDERSCORE: '\\sum' [ ]* '_' ;
 
 CMD_MATHRM: '\\mathrm' ;
 
@@ -62,8 +72,8 @@ CMD_COTH: 'coth' ;
 CMD_LN: 'ln' ;
 CMD_LOG: 'log' ;
 CMD_SLASH_LOG_UNDERSCORE: '\\log' [ ]* '_' ;
-CMD_SLASH_LOG_UNDERSCORE_SINGLE_CHAR_NUMBER: '\\log' [ ]* '_' [0-9] ;
-CMD_SLASH_LOG_UNDERSCORE_SINGLE_CHAR_ID: '\\log' [ ]* '_' [a-zA-Z] ;
+CMD_SLASH_LOG_UNDERSCORE_SINGLE_CHAR_NUMBER: '\\log' [ ]* UNDERSCORE_SINGLE_CHAR_NUMBER ;
+CMD_SLASH_LOG_UNDERSCORE_SINGLE_CHAR_ID: '\\log' [ ]* UNDERSCORE_SINGLE_CHAR_ID ;
 
 COMMENT: '\\text{' .*? '}' -> skip ;
 
@@ -116,7 +126,7 @@ AMPERSAND: '&';
 DOUBLE_BACKSLASH: '\\\\';
 
 
-UNDERSCORE_SUBSCRIPT: (([ ]* '_{' [a-zA-Z0-9]+ '}') | ([ ]* '_' [a-zA-Z0-9]));
+UNDERSCORE_SUBSCRIPT: (([ ]* '_{' [a-zA-Z0-9]+ '}') | ([ ]* (UNDERSCORE_SINGLE_CHAR_ID | UNDERSCORE_SINGLE_CHAR_NUMBER) ));
 
 CARET_SINGLE_CHAR_ID_UNDERSCORE_SUBSCRIPT: '^'[a-zA-Z] UNDERSCORE_SUBSCRIPT;
 
diff --git a/src/parser/LatexLexer.ts b/src/parser/LatexLexer.ts
index c077a7fd..2478f044 100644
--- a/src/parser/LatexLexer.ts
+++ b/src/parser/LatexLexer.ts
@@ -24,93 +24,95 @@ export default class LatexLexer extends Lexer {
 	public static readonly UNDERSCORE = 10;
 	public static readonly EXCLAMATION = 11;
 	public static readonly PI = 12;
-	public static readonly CMD_INT = 13;
-	public static readonly CMD_INT_UNDERSCORE = 14;
-	public static readonly CMD_INT_UNDERSCORE_SINGLE_CHAR_NUMBER = 15;
-	public static readonly CMD_INT_UNDERSCORE_SINGLE_CHAR_ID = 16;
-	public static readonly CMD_MATHRM = 17;
-	public static readonly CMD_FRAC = 18;
-	public static readonly CMD_FRAC_INTS = 19;
-	public static readonly CMD_CDOT = 20;
-	public static readonly CMD_TIMES = 21;
-	public static readonly CMD_SQRT = 22;
-	public static readonly CMD_SQRT_INT = 23;
-	public static readonly CMD_SIM = 24;
-	public static readonly CMD_APPROX = 25;
-	public static readonly CMD_PLACEHOLDER = 26;
-	public static readonly TRANSPOSE = 27;
-	public static readonly BACKSLASH = 28;
-	public static readonly AS_LINES = 29;
-	public static readonly CMD_SIN = 30;
-	public static readonly CMD_COS = 31;
-	public static readonly CMD_TAN = 32;
-	public static readonly CMD_COT = 33;
-	public static readonly CMD_SEC = 34;
-	public static readonly CMD_CSC = 35;
-	public static readonly CMD_ARCSIN = 36;
-	public static readonly CMD_ARCCOS = 37;
-	public static readonly CMD_ARCTAN = 38;
-	public static readonly CMD_SINH = 39;
-	public static readonly CMD_COSH = 40;
-	public static readonly CMD_TANH = 41;
-	public static readonly CMD_COTH = 42;
-	public static readonly CMD_LN = 43;
-	public static readonly CMD_LOG = 44;
-	public static readonly CMD_SLASH_LOG_UNDERSCORE = 45;
-	public static readonly CMD_SLASH_LOG_UNDERSCORE_SINGLE_CHAR_NUMBER = 46;
-	public static readonly CMD_SLASH_LOG_UNDERSCORE_SINGLE_CHAR_ID = 47;
-	public static readonly COMMENT = 48;
-	public static readonly CMD_LEFT = 49;
-	public static readonly CMD_RIGHT = 50;
-	public static readonly DOUBLE_DOLLAR_SIGN = 51;
-	public static readonly ADD = 52;
-	public static readonly SUB = 53;
-	public static readonly CARET = 54;
-	public static readonly EQ = 55;
-	public static readonly LT = 56;
-	public static readonly GT = 57;
-	public static readonly LTE = 58;
-	public static readonly GTE = 59;
-	public static readonly COMMA = 60;
-	public static readonly DECIMAL_POINT = 61;
-	public static readonly CARET_SINGLE_CHAR_NUMBER = 62;
-	public static readonly CARET_SINGLE_CHAR_ID = 63;
-	public static readonly NUMBER = 64;
-	public static readonly BEGIN_MATRIX = 65;
-	public static readonly END_MATRIX = 66;
-	public static readonly AMPERSAND = 67;
-	public static readonly DOUBLE_BACKSLASH = 68;
-	public static readonly UNDERSCORE_SUBSCRIPT = 69;
-	public static readonly CARET_SINGLE_CHAR_ID_UNDERSCORE_SUBSCRIPT = 70;
-	public static readonly ID = 71;
-	public static readonly WS = 72;
-	public static readonly SLASH_SPACE = 73;
-	public static readonly SLASH_COLON = 74;
-	public static readonly NBSP = 75;
-	public static readonly ERROR_CHAR = 76;
-	public static readonly R_BRACKET = 77;
-	public static readonly ALT_R_BRACKET = 78;
-	public static readonly U_CMD_FRAC = 79;
-	public static readonly U_CMD_FRAC_INTS = 80;
-	public static readonly U_CMD_CDOT = 81;
-	public static readonly U_CMD_TIMES = 82;
-	public static readonly U_CMD_SQRT = 83;
-	public static readonly U_COMMA = 84;
-	public static readonly U_CARET = 85;
-	public static readonly U_NAME = 86;
-	public static readonly U_L_PAREN = 87;
-	public static readonly U_R_PAREN = 88;
-	public static readonly U_L_BRACE = 89;
-	public static readonly U_R_BRACE = 90;
-	public static readonly U_ONE = 91;
-	public static readonly U_NUMBER = 92;
-	public static readonly U_CMD_LEFT = 93;
-	public static readonly U_CMD_RIGHT = 94;
-	public static readonly U_WS = 95;
-	public static readonly U_SLASH_SPACE = 96;
-	public static readonly U_SLASH_COLON = 97;
-	public static readonly U_NBSP = 98;
-	public static readonly U_ERROR_CHAR = 99;
+	public static readonly INFINITY = 13;
+	public static readonly CMD_INT = 14;
+	public static readonly CMD_INT_UNDERSCORE = 15;
+	public static readonly CMD_INT_UNDERSCORE_SINGLE_CHAR_NUMBER = 16;
+	public static readonly CMD_INT_UNDERSCORE_SINGLE_CHAR_ID = 17;
+	public static readonly CMD_SUM_UNDERSCORE = 18;
+	public static readonly CMD_MATHRM = 19;
+	public static readonly CMD_FRAC = 20;
+	public static readonly CMD_FRAC_INTS = 21;
+	public static readonly CMD_CDOT = 22;
+	public static readonly CMD_TIMES = 23;
+	public static readonly CMD_SQRT = 24;
+	public static readonly CMD_SQRT_INT = 25;
+	public static readonly CMD_SIM = 26;
+	public static readonly CMD_APPROX = 27;
+	public static readonly CMD_PLACEHOLDER = 28;
+	public static readonly TRANSPOSE = 29;
+	public static readonly BACKSLASH = 30;
+	public static readonly AS_LINES = 31;
+	public static readonly CMD_SIN = 32;
+	public static readonly CMD_COS = 33;
+	public static readonly CMD_TAN = 34;
+	public static readonly CMD_COT = 35;
+	public static readonly CMD_SEC = 36;
+	public static readonly CMD_CSC = 37;
+	public static readonly CMD_ARCSIN = 38;
+	public static readonly CMD_ARCCOS = 39;
+	public static readonly CMD_ARCTAN = 40;
+	public static readonly CMD_SINH = 41;
+	public static readonly CMD_COSH = 42;
+	public static readonly CMD_TANH = 43;
+	public static readonly CMD_COTH = 44;
+	public static readonly CMD_LN = 45;
+	public static readonly CMD_LOG = 46;
+	public static readonly CMD_SLASH_LOG_UNDERSCORE = 47;
+	public static readonly CMD_SLASH_LOG_UNDERSCORE_SINGLE_CHAR_NUMBER = 48;
+	public static readonly CMD_SLASH_LOG_UNDERSCORE_SINGLE_CHAR_ID = 49;
+	public static readonly COMMENT = 50;
+	public static readonly CMD_LEFT = 51;
+	public static readonly CMD_RIGHT = 52;
+	public static readonly DOUBLE_DOLLAR_SIGN = 53;
+	public static readonly ADD = 54;
+	public static readonly SUB = 55;
+	public static readonly CARET = 56;
+	public static readonly EQ = 57;
+	public static readonly LT = 58;
+	public static readonly GT = 59;
+	public static readonly LTE = 60;
+	public static readonly GTE = 61;
+	public static readonly COMMA = 62;
+	public static readonly DECIMAL_POINT = 63;
+	public static readonly CARET_SINGLE_CHAR_NUMBER = 64;
+	public static readonly CARET_SINGLE_CHAR_ID = 65;
+	public static readonly NUMBER = 66;
+	public static readonly BEGIN_MATRIX = 67;
+	public static readonly END_MATRIX = 68;
+	public static readonly AMPERSAND = 69;
+	public static readonly DOUBLE_BACKSLASH = 70;
+	public static readonly UNDERSCORE_SUBSCRIPT = 71;
+	public static readonly CARET_SINGLE_CHAR_ID_UNDERSCORE_SUBSCRIPT = 72;
+	public static readonly ID = 73;
+	public static readonly WS = 74;
+	public static readonly SLASH_SPACE = 75;
+	public static readonly SLASH_COLON = 76;
+	public static readonly NBSP = 77;
+	public static readonly ERROR_CHAR = 78;
+	public static readonly R_BRACKET = 79;
+	public static readonly ALT_R_BRACKET = 80;
+	public static readonly U_CMD_FRAC = 81;
+	public static readonly U_CMD_FRAC_INTS = 82;
+	public static readonly U_CMD_CDOT = 83;
+	public static readonly U_CMD_TIMES = 84;
+	public static readonly U_CMD_SQRT = 85;
+	public static readonly U_COMMA = 86;
+	public static readonly U_CARET = 87;
+	public static readonly U_NAME = 88;
+	public static readonly U_L_PAREN = 89;
+	public static readonly U_R_PAREN = 90;
+	public static readonly U_L_BRACE = 91;
+	public static readonly U_R_BRACE = 92;
+	public static readonly U_ONE = 93;
+	public static readonly U_NUMBER = 94;
+	public static readonly U_CMD_LEFT = 95;
+	public static readonly U_CMD_RIGHT = 96;
+	public static readonly U_WS = 97;
+	public static readonly U_SLASH_SPACE = 98;
+	public static readonly U_SLASH_COLON = 99;
+	public static readonly U_NBSP = 100;
+	public static readonly U_ERROR_CHAR = 101;
 	public static readonly EOF = Token.EOF;
 	public static readonly UNITS = 1;
 
@@ -118,8 +120,9 @@ export default class LatexLexer extends Lexer {
 	public static readonly literalNames: string[] = [ null, "'['", "'\\lbrack'", 
                                                    "';'", null, null, null, 
                                                    null, "'|'", null, "'_'", 
-                                                   "'!'", "'\\pi'", "'\\int'", 
-                                                   null, null, null, "'\\mathrm'", 
+                                                   "'!'", "'\\pi'", "'\\infty'", 
+                                                   "'\\int'", null, null, 
+                                                   null, null, "'\\mathrm'", 
                                                    null, null, null, null, 
                                                    null, null, "'\\sim'", 
                                                    "'\\approx'", "'\\placeholder'", 
@@ -150,9 +153,11 @@ export default class LatexLexer extends Lexer {
                                                     "R_BRACE", "L_PAREN", 
                                                     "R_PAREN", "VBAR", "DOUBLE_VBAR", 
                                                     "UNDERSCORE", "EXCLAMATION", 
-                                                    "PI", "CMD_INT", "CMD_INT_UNDERSCORE", 
+                                                    "PI", "INFINITY", "CMD_INT", 
+                                                    "CMD_INT_UNDERSCORE", 
                                                     "CMD_INT_UNDERSCORE_SINGLE_CHAR_NUMBER", 
                                                     "CMD_INT_UNDERSCORE_SINGLE_CHAR_ID", 
+                                                    "CMD_SUM_UNDERSCORE", 
                                                     "CMD_MATHRM", "CMD_FRAC", 
                                                     "CMD_FRAC_INTS", "CMD_CDOT", 
                                                     "CMD_TIMES", "CMD_SQRT", 
@@ -200,13 +205,14 @@ export default class LatexLexer extends Lexer {
 
 	public static readonly ruleNames: string[] = [
 		"L_BRACKET", "ALT_L_BRACKET", "SEMICOLON", "L_BRACE", "R_BRACE", "L_PAREN", 
-		"R_PAREN", "VBAR", "DOUBLE_VBAR", "UNDERSCORE", "EXCLAMATION", "PI", "CMD_INT", 
+		"R_PAREN", "VBAR", "DOUBLE_VBAR", "UNDERSCORE", "UNDERSCORE_SINGLE_CHAR_NUMBER", 
+		"UNDERSCORE_SINGLE_CHAR_ID", "EXCLAMATION", "PI", "INFINITY", "CMD_INT", 
 		"CMD_INT_UNDERSCORE", "CMD_INT_UNDERSCORE_SINGLE_CHAR_NUMBER", "CMD_INT_UNDERSCORE_SINGLE_CHAR_ID", 
-		"CMD_MATHRM", "CMD_FRAC", "CMD_FRAC_INTS", "CMD_CDOT", "CMD_TIMES", "CMD_SQRT", 
-		"CMD_SQRT_INT", "CMD_SIM", "CMD_APPROX", "CMD_PLACEHOLDER", "TRANSPOSE", 
-		"BACKSLASH", "AS_LINES", "CMD_SIN", "CMD_COS", "CMD_TAN", "CMD_COT", "CMD_SEC", 
-		"CMD_CSC", "CMD_ARCSIN", "CMD_ARCCOS", "CMD_ARCTAN", "CMD_SINH", "CMD_COSH", 
-		"CMD_TANH", "CMD_COTH", "CMD_LN", "CMD_LOG", "CMD_SLASH_LOG_UNDERSCORE", 
+		"CMD_SUM_UNDERSCORE", "CMD_MATHRM", "CMD_FRAC", "CMD_FRAC_INTS", "CMD_CDOT", 
+		"CMD_TIMES", "CMD_SQRT", "CMD_SQRT_INT", "CMD_SIM", "CMD_APPROX", "CMD_PLACEHOLDER", 
+		"TRANSPOSE", "BACKSLASH", "AS_LINES", "CMD_SIN", "CMD_COS", "CMD_TAN", 
+		"CMD_COT", "CMD_SEC", "CMD_CSC", "CMD_ARCSIN", "CMD_ARCCOS", "CMD_ARCTAN", 
+		"CMD_SINH", "CMD_COSH", "CMD_TANH", "CMD_COTH", "CMD_LN", "CMD_LOG", "CMD_SLASH_LOG_UNDERSCORE", 
 		"CMD_SLASH_LOG_UNDERSCORE_SINGLE_CHAR_NUMBER", "CMD_SLASH_LOG_UNDERSCORE_SINGLE_CHAR_ID", 
 		"COMMENT", "CMD_LEFT", "CMD_RIGHT", "DOUBLE_DOLLAR_SIGN", "ADD", "SUB", 
 		"CARET", "EQ", "LT", "GT", "LTE", "GTE", "COMMA", "DECIMAL_POINT", "CARET_SINGLE_CHAR_NUMBER", 
@@ -238,370 +244,382 @@ export default class LatexLexer extends Lexer {
 
 	public get modeNames(): string[] { return LatexLexer.modeNames; }
 
-	public static readonly _serializedATN: number[] = [4,0,99,1084,6,-1,6,-1,
-	2,0,7,0,2,1,7,1,2,2,7,2,2,3,7,3,2,4,7,4,2,5,7,5,2,6,7,6,2,7,7,7,2,8,7,8,
-	2,9,7,9,2,10,7,10,2,11,7,11,2,12,7,12,2,13,7,13,2,14,7,14,2,15,7,15,2,16,
-	7,16,2,17,7,17,2,18,7,18,2,19,7,19,2,20,7,20,2,21,7,21,2,22,7,22,2,23,7,
-	23,2,24,7,24,2,25,7,25,2,26,7,26,2,27,7,27,2,28,7,28,2,29,7,29,2,30,7,30,
-	2,31,7,31,2,32,7,32,2,33,7,33,2,34,7,34,2,35,7,35,2,36,7,36,2,37,7,37,2,
-	38,7,38,2,39,7,39,2,40,7,40,2,41,7,41,2,42,7,42,2,43,7,43,2,44,7,44,2,45,
-	7,45,2,46,7,46,2,47,7,47,2,48,7,48,2,49,7,49,2,50,7,50,2,51,7,51,2,52,7,
-	52,2,53,7,53,2,54,7,54,2,55,7,55,2,56,7,56,2,57,7,57,2,58,7,58,2,59,7,59,
-	2,60,7,60,2,61,7,61,2,62,7,62,2,63,7,63,2,64,7,64,2,65,7,65,2,66,7,66,2,
-	67,7,67,2,68,7,68,2,69,7,69,2,70,7,70,2,71,7,71,2,72,7,72,2,73,7,73,2,74,
-	7,74,2,75,7,75,2,76,7,76,2,77,7,77,2,78,7,78,2,79,7,79,2,80,7,80,2,81,7,
-	81,2,82,7,82,2,83,7,83,2,84,7,84,2,85,7,85,2,86,7,86,2,87,7,87,2,88,7,88,
-	2,89,7,89,2,90,7,90,2,91,7,91,2,92,7,92,2,93,7,93,2,94,7,94,2,95,7,95,2,
-	96,7,96,2,97,7,97,2,98,7,98,2,99,7,99,2,100,7,100,2,101,7,101,2,102,7,102,
-	2,103,7,103,1,0,1,0,1,0,1,0,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,2,
-	1,2,1,3,1,3,1,4,1,4,1,5,1,5,1,6,1,6,1,7,1,7,1,8,1,8,1,8,1,8,1,8,1,8,1,8,
-	3,8,244,8,8,1,9,1,9,1,10,1,10,1,11,1,11,1,11,1,11,1,12,1,12,1,12,1,12,1,
-	12,1,13,1,13,1,13,1,13,1,13,1,13,5,13,265,8,13,10,13,12,13,268,9,13,1,13,
-	1,13,1,14,1,14,1,14,1,14,1,14,1,14,5,14,278,8,14,10,14,12,14,281,9,14,1,
-	14,1,14,1,14,1,15,1,15,1,15,1,15,1,15,1,15,5,15,292,8,15,10,15,12,15,295,
-	9,15,1,15,1,15,1,15,1,16,1,16,1,16,1,16,1,16,1,16,1,16,1,16,1,17,1,17,1,
-	17,1,17,1,17,1,17,1,18,1,18,1,18,1,18,1,18,1,18,1,18,5,18,321,8,18,10,18,
-	12,18,324,9,18,1,18,1,18,1,18,1,19,1,19,1,19,1,19,1,19,1,19,1,20,1,20,1,
-	20,1,20,1,20,1,20,1,20,1,21,1,21,1,21,1,21,1,21,1,21,1,22,1,22,1,22,1,22,
-	1,22,1,22,1,22,5,22,355,8,22,10,22,12,22,358,9,22,1,22,1,22,1,23,1,23,1,
-	23,1,23,1,23,1,24,1,24,1,24,1,24,1,24,1,24,1,24,1,24,1,25,1,25,1,25,1,25,
-	1,25,1,25,1,25,1,25,1,25,1,25,1,25,1,25,1,25,1,26,1,26,1,26,1,26,1,26,1,
-	26,1,26,1,26,1,26,1,26,1,26,1,26,1,26,1,26,1,27,1,27,1,28,1,28,1,28,1,28,
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-	0,0,880,881,5,95,0,0,881,882,5,123,0,0,882,884,1,0,0,0,883,885,7,4,0,0,
-	884,883,1,0,0,0,885,886,1,0,0,0,886,884,1,0,0,0,886,887,1,0,0,0,887,888,
-	1,0,0,0,888,898,5,125,0,0,889,891,7,0,0,0,890,889,1,0,0,0,891,894,1,0,0,
-	0,892,890,1,0,0,0,892,893,1,0,0,0,893,895,1,0,0,0,894,892,1,0,0,0,895,896,
-	5,95,0,0,896,898,7,4,0,0,897,877,1,0,0,0,897,892,1,0,0,0,898,147,1,0,0,
-	0,899,900,5,94,0,0,900,901,7,2,0,0,901,902,3,146,72,0,902,149,1,0,0,0,903,
-	906,3,132,65,0,904,906,3,136,67,0,905,903,1,0,0,0,905,904,1,0,0,0,906,908,
-	1,0,0,0,907,909,3,146,72,0,908,907,1,0,0,0,908,909,1,0,0,0,909,151,1,0,
-	0,0,910,912,7,7,0,0,911,910,1,0,0,0,912,913,1,0,0,0,913,911,1,0,0,0,913,
-	914,1,0,0,0,914,915,1,0,0,0,915,916,6,75,1,0,916,153,1,0,0,0,917,918,5,
-	92,0,0,918,919,5,32,0,0,919,920,1,0,0,0,920,921,6,76,1,0,921,155,1,0,0,
-	0,922,923,5,92,0,0,923,924,5,58,0,0,924,925,1,0,0,0,925,926,6,77,1,0,926,
-	157,1,0,0,0,927,928,5,160,0,0,928,929,1,0,0,0,929,930,6,78,1,0,930,159,
-	1,0,0,0,931,932,9,0,0,0,932,161,1,0,0,0,933,934,5,93,0,0,934,935,1,0,0,
-	0,935,936,6,80,2,0,936,163,1,0,0,0,937,938,5,92,0,0,938,939,5,114,0,0,939,
-	940,5,98,0,0,940,941,5,114,0,0,941,942,5,97,0,0,942,943,5,99,0,0,943,944,
-	5,107,0,0,944,945,1,0,0,0,945,946,6,81,2,0,946,165,1,0,0,0,947,948,5,92,
-	0,0,948,949,5,102,0,0,949,950,5,114,0,0,950,951,5,97,0,0,951,952,5,99,0,
-	0,952,167,1,0,0,0,953,954,5,92,0,0,954,955,5,102,0,0,955,956,5,114,0,0,
-	956,957,5,97,0,0,957,958,5,99,0,0,958,962,1,0,0,0,959,961,7,0,0,0,960,959,
-	1,0,0,0,961,964,1,0,0,0,962,960,1,0,0,0,962,963,1,0,0,0,963,965,1,0,0,0,
-	964,962,1,0,0,0,965,966,7,1,0,0,966,967,7,1,0,0,967,169,1,0,0,0,968,969,
-	5,92,0,0,969,970,5,99,0,0,970,971,5,100,0,0,971,972,5,111,0,0,972,973,5,
-	116,0,0,973,171,1,0,0,0,974,975,5,92,0,0,975,976,5,116,0,0,976,977,5,105,
-	0,0,977,978,5,109,0,0,978,979,5,101,0,0,979,980,5,115,0,0,980,173,1,0,0,
-	0,981,982,5,92,0,0,982,983,5,115,0,0,983,984,5,113,0,0,984,985,5,114,0,
-	0,985,986,5,116,0,0,986,175,1,0,0,0,987,988,5,44,0,0,988,177,1,0,0,0,989,
-	990,5,94,0,0,990,179,1,0,0,0,991,995,7,2,0,0,992,994,7,4,0,0,993,992,1,
-	0,0,0,994,997,1,0,0,0,995,993,1,0,0,0,995,996,1,0,0,0,996,181,1,0,0,0,997,
-	995,1,0,0,0,998,999,5,40,0,0,999,183,1,0,0,0,1000,1001,5,41,0,0,1001,185,
-	1,0,0,0,1002,1003,5,123,0,0,1003,187,1,0,0,0,1004,1005,5,125,0,0,1005,189,
-	1,0,0,0,1006,1007,5,49,0,0,1007,191,1,0,0,0,1008,1010,5,45,0,0,1009,1008,
-	1,0,0,0,1009,1010,1,0,0,0,1010,1012,1,0,0,0,1011,1013,3,194,96,0,1012,1011,
-	1,0,0,0,1013,1014,1,0,0,0,1014,1012,1,0,0,0,1014,1015,1,0,0,0,1015,1016,
-	1,0,0,0,1016,1020,5,46,0,0,1017,1019,3,194,96,0,1018,1017,1,0,0,0,1019,
-	1022,1,0,0,0,1020,1018,1,0,0,0,1020,1021,1,0,0,0,1021,1041,1,0,0,0,1022,
-	1020,1,0,0,0,1023,1025,5,45,0,0,1024,1023,1,0,0,0,1024,1025,1,0,0,0,1025,
-	1026,1,0,0,0,1026,1028,5,46,0,0,1027,1029,3,194,96,0,1028,1027,1,0,0,0,
-	1029,1030,1,0,0,0,1030,1028,1,0,0,0,1030,1031,1,0,0,0,1031,1041,1,0,0,0,
-	1032,1034,5,45,0,0,1033,1032,1,0,0,0,1033,1034,1,0,0,0,1034,1036,1,0,0,
-	0,1035,1037,3,194,96,0,1036,1035,1,0,0,0,1037,1038,1,0,0,0,1038,1036,1,
-	0,0,0,1038,1039,1,0,0,0,1039,1041,1,0,0,0,1040,1009,1,0,0,0,1040,1024,1,
-	0,0,0,1040,1033,1,0,0,0,1041,193,1,0,0,0,1042,1043,7,1,0,0,1043,195,1,0,
-	0,0,1044,1045,5,92,0,0,1045,1046,5,108,0,0,1046,1047,5,101,0,0,1047,1048,
-	5,102,0,0,1048,1049,5,116,0,0,1049,1050,1,0,0,0,1050,1051,6,97,1,0,1051,
-	197,1,0,0,0,1052,1053,5,92,0,0,1053,1054,5,114,0,0,1054,1055,5,105,0,0,
-	1055,1056,5,103,0,0,1056,1057,5,104,0,0,1057,1058,5,116,0,0,1058,1059,1,
-	0,0,0,1059,1060,6,98,1,0,1060,199,1,0,0,0,1061,1063,7,7,0,0,1062,1061,1,
-	0,0,0,1063,1064,1,0,0,0,1064,1062,1,0,0,0,1064,1065,1,0,0,0,1065,1066,1,
-	0,0,0,1066,1067,6,99,1,0,1067,201,1,0,0,0,1068,1069,5,92,0,0,1069,1070,
-	5,32,0,0,1070,1071,1,0,0,0,1071,1072,6,100,1,0,1072,203,1,0,0,0,1073,1074,
-	5,92,0,0,1074,1075,5,58,0,0,1075,1076,1,0,0,0,1076,1077,6,101,1,0,1077,
-	205,1,0,0,0,1078,1079,5,160,0,0,1079,1080,1,0,0,0,1080,1081,6,102,1,0,1081,
-	207,1,0,0,0,1082,1083,9,0,0,0,1083,209,1,0,0,0,54,0,1,243,266,279,293,322,
-	356,409,411,419,501,514,528,544,558,570,612,618,622,628,631,636,639,641,
-	649,654,659,664,669,674,684,689,693,695,837,877,886,892,897,905,908,913,
-	962,995,1009,1014,1020,1024,1030,1033,1038,1040,1064,3,2,1,0,6,0,0,2,0,
-	0];
+	public static readonly _serializedATN: number[] = [4,0,101,1116,6,-1,6,
+	-1,2,0,7,0,2,1,7,1,2,2,7,2,2,3,7,3,2,4,7,4,2,5,7,5,2,6,7,6,2,7,7,7,2,8,
+	7,8,2,9,7,9,2,10,7,10,2,11,7,11,2,12,7,12,2,13,7,13,2,14,7,14,2,15,7,15,
+	2,16,7,16,2,17,7,17,2,18,7,18,2,19,7,19,2,20,7,20,2,21,7,21,2,22,7,22,2,
+	23,7,23,2,24,7,24,2,25,7,25,2,26,7,26,2,27,7,27,2,28,7,28,2,29,7,29,2,30,
+	7,30,2,31,7,31,2,32,7,32,2,33,7,33,2,34,7,34,2,35,7,35,2,36,7,36,2,37,7,
+	37,2,38,7,38,2,39,7,39,2,40,7,40,2,41,7,41,2,42,7,42,2,43,7,43,2,44,7,44,
+	2,45,7,45,2,46,7,46,2,47,7,47,2,48,7,48,2,49,7,49,2,50,7,50,2,51,7,51,2,
+	52,7,52,2,53,7,53,2,54,7,54,2,55,7,55,2,56,7,56,2,57,7,57,2,58,7,58,2,59,
+	7,59,2,60,7,60,2,61,7,61,2,62,7,62,2,63,7,63,2,64,7,64,2,65,7,65,2,66,7,
+	66,2,67,7,67,2,68,7,68,2,69,7,69,2,70,7,70,2,71,7,71,2,72,7,72,2,73,7,73,
+	2,74,7,74,2,75,7,75,2,76,7,76,2,77,7,77,2,78,7,78,2,79,7,79,2,80,7,80,2,
+	81,7,81,2,82,7,82,2,83,7,83,2,84,7,84,2,85,7,85,2,86,7,86,2,87,7,87,2,88,
+	7,88,2,89,7,89,2,90,7,90,2,91,7,91,2,92,7,92,2,93,7,93,2,94,7,94,2,95,7,
+	95,2,96,7,96,2,97,7,97,2,98,7,98,2,99,7,99,2,100,7,100,2,101,7,101,2,102,
+	7,102,2,103,7,103,2,104,7,104,2,105,7,105,2,106,7,106,2,107,7,107,1,0,1,
+	0,1,0,1,0,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,2,1,2,1,3,1,3,1,4,1,
+	4,1,5,1,5,1,6,1,6,1,7,1,7,1,8,1,8,1,8,1,8,1,8,1,8,1,8,3,8,252,8,8,1,9,1,
+	9,1,10,1,10,1,10,1,11,1,11,1,11,1,12,1,12,1,13,1,13,1,13,1,13,1,14,1,14,
+	1,14,1,14,1,14,1,14,1,14,1,15,1,15,1,15,1,15,1,15,1,16,1,16,1,16,1,16,1,
+	16,1,16,5,16,286,8,16,10,16,12,16,289,9,16,1,16,1,16,1,17,1,17,1,17,1,17,
+	1,17,1,17,5,17,299,8,17,10,17,12,17,302,9,17,1,17,1,17,1,18,1,18,1,18,1,
+	18,1,18,1,18,5,18,312,8,18,10,18,12,18,315,9,18,1,18,1,18,1,19,1,19,1,19,
+	1,19,1,19,1,19,5,19,325,8,19,10,19,12,19,328,9,19,1,19,1,19,1,20,1,20,1,
+	20,1,20,1,20,1,20,1,20,1,20,1,21,1,21,1,21,1,21,1,21,1,21,1,22,1,22,1,22,
+	1,22,1,22,1,22,1,22,5,22,353,8,22,10,22,12,22,356,9,22,1,22,1,22,1,22,1,
+	23,1,23,1,23,1,23,1,23,1,23,1,24,1,24,1,24,1,24,1,24,1,24,1,24,1,25,1,25,
+	1,25,1,25,1,25,1,25,1,26,1,26,1,26,1,26,1,26,1,26,1,26,5,26,387,8,26,10,
+	26,12,26,390,9,26,1,26,1,26,1,27,1,27,1,27,1,27,1,27,1,28,1,28,1,28,1,28,
+	1,28,1,28,1,28,1,28,1,29,1,29,1,29,1,29,1,29,1,29,1,29,1,29,1,29,1,29,1,
+	29,1,29,1,29,1,30,1,30,1,30,1,30,1,30,1,30,1,30,1,30,1,30,1,30,1,30,1,30,
+	1,30,1,30,1,31,1,31,1,32,1,32,1,32,1,32,1,32,1,32,4,32,442,8,32,11,32,12,
+	32,443,1,32,1,32,1,32,1,32,1,32,1,32,3,32,452,8,32,1,33,1,33,1,33,1,33,
+	1,34,1,34,1,34,1,34,1,35,1,35,1,35,1,35,1,36,1,36,1,36,1,36,1,37,1,37,1,
+	37,1,37,1,38,1,38,1,38,1,38,1,39,1,39,1,39,1,39,1,39,1,39,1,39,1,40,1,40,
+	1,40,1,40,1,40,1,40,1,40,1,41,1,41,1,41,1,41,1,41,1,41,1,41,1,42,1,42,1,
+	42,1,42,1,42,1,43,1,43,1,43,1,43,1,43,1,44,1,44,1,44,1,44,1,44,1,45,1,45,
+	1,45,1,45,1,45,1,46,1,46,1,46,1,47,1,47,1,47,1,47,1,48,1,48,1,48,1,48,1,
+	48,1,48,5,48,532,8,48,10,48,12,48,535,9,48,1,48,1,48,1,49,1,49,1,49,1,49,
+	1,49,1,49,5,49,545,8,49,10,49,12,49,548,9,49,1,49,1,49,1,50,1,50,1,50,1,
+	50,1,50,1,50,5,50,558,8,50,10,50,12,50,561,9,50,1,50,1,50,1,51,1,51,1,51,
+	1,51,1,51,1,51,1,51,1,51,5,51,573,8,51,10,51,12,51,576,9,51,1,51,1,51,1,
+	51,1,51,1,52,1,52,1,52,1,52,1,52,1,52,1,52,3,52,589,8,52,1,52,1,52,1,53,
+	1,53,1,53,1,53,1,53,1,53,1,53,1,53,3,53,601,8,53,1,53,1,53,1,54,1,54,1,
+	54,1,54,1,54,1,55,1,55,1,56,1,56,1,57,1,57,1,58,1,58,1,59,1,59,1,60,1,60,
+	1,61,1,61,1,61,1,61,1,62,1,62,1,62,1,62,1,63,1,63,1,64,1,64,1,65,1,65,1,
+	65,1,66,1,66,1,66,1,67,4,67,641,8,67,11,67,12,67,642,1,67,1,67,5,67,647,
+	8,67,10,67,12,67,650,9,67,1,67,3,67,653,8,67,1,67,1,67,4,67,657,8,67,11,
+	67,12,67,658,1,67,3,67,662,8,67,1,67,4,67,665,8,67,11,67,12,67,666,1,67,
+	3,67,670,8,67,3,67,672,8,67,1,68,1,68,1,69,1,69,5,69,678,8,69,10,69,12,
+	69,681,9,69,1,70,1,70,3,70,685,8,70,1,70,4,70,688,8,70,11,70,12,70,689,
+	1,70,5,70,693,8,70,10,70,12,70,696,9,70,1,70,1,70,3,70,700,8,70,1,70,5,
+	70,703,8,70,10,70,12,70,706,9,70,1,70,1,70,1,70,1,70,1,70,1,70,1,70,3,70,
+	715,8,70,1,70,4,70,718,8,70,11,70,12,70,719,1,70,1,70,3,70,724,8,70,3,70,
+	726,8,70,1,71,1,71,1,71,1,71,1,71,1,71,1,71,1,71,1,71,1,71,1,71,1,71,1,
+	71,1,71,1,71,1,71,1,71,1,71,1,71,1,71,1,71,1,71,1,71,1,71,1,71,1,71,1,71,
+	1,71,1,71,1,71,1,71,1,71,1,71,1,71,1,71,1,71,1,71,1,71,1,71,1,71,1,71,1,
+	71,1,71,1,71,1,71,1,71,1,71,1,71,1,71,1,71,1,71,1,71,1,71,1,71,1,71,1,71,
+	1,71,1,71,1,71,1,71,1,71,1,71,1,71,1,71,1,71,1,71,1,71,1,71,1,71,1,71,1,
+	71,1,71,1,71,1,71,1,71,1,71,1,71,1,71,1,71,1,71,1,71,1,71,1,71,1,71,1,71,
+	1,71,1,71,1,71,1,71,1,71,1,71,1,71,1,71,1,71,1,71,1,71,1,71,1,71,1,71,1,
+	71,1,71,1,71,1,71,1,71,1,71,1,71,1,71,1,71,1,71,1,71,1,71,1,71,1,71,1,71,
+	1,71,1,71,1,71,1,71,1,71,1,71,1,71,1,71,1,71,1,71,1,71,1,71,1,71,1,71,1,
+	71,1,71,1,71,1,71,1,71,1,71,1,71,1,71,1,71,1,71,1,71,1,71,3,71,868,8,71,
+	1,72,1,72,1,72,1,72,1,72,1,72,1,72,1,72,1,72,1,72,1,72,1,72,1,72,1,72,1,
+	72,1,72,1,73,1,73,1,73,1,73,1,73,1,73,1,73,1,73,1,73,1,73,1,73,1,73,1,73,
+	1,73,1,74,1,74,1,75,1,75,1,75,1,76,5,76,906,8,76,10,76,12,76,909,9,76,1,
+	76,1,76,1,76,1,76,4,76,915,8,76,11,76,12,76,916,1,76,1,76,5,76,921,8,76,
+	10,76,12,76,924,9,76,1,76,1,76,3,76,928,8,76,3,76,930,8,76,1,77,1,77,1,
+	77,1,77,1,78,1,78,3,78,938,8,78,1,78,3,78,941,8,78,1,79,4,79,944,8,79,11,
+	79,12,79,945,1,79,1,79,1,80,1,80,1,80,1,80,1,80,1,81,1,81,1,81,1,81,1,81,
+	1,82,1,82,1,82,1,82,1,83,1,83,1,84,1,84,1,84,1,84,1,85,1,85,1,85,1,85,1,
+	85,1,85,1,85,1,85,1,85,1,85,1,86,1,86,1,86,1,86,1,86,1,86,1,87,1,87,1,87,
+	1,87,1,87,1,87,1,87,5,87,993,8,87,10,87,12,87,996,9,87,1,87,1,87,1,87,1,
+	88,1,88,1,88,1,88,1,88,1,88,1,89,1,89,1,89,1,89,1,89,1,89,1,89,1,90,1,90,
+	1,90,1,90,1,90,1,90,1,91,1,91,1,92,1,92,1,93,1,93,5,93,1026,8,93,10,93,
+	12,93,1029,9,93,1,94,1,94,1,95,1,95,1,96,1,96,1,97,1,97,1,98,1,98,1,99,
+	3,99,1042,8,99,1,99,4,99,1045,8,99,11,99,12,99,1046,1,99,1,99,5,99,1051,
+	8,99,10,99,12,99,1054,9,99,1,99,3,99,1057,8,99,1,99,1,99,4,99,1061,8,99,
+	11,99,12,99,1062,1,99,3,99,1066,8,99,1,99,4,99,1069,8,99,11,99,12,99,1070,
+	3,99,1073,8,99,1,100,1,100,1,101,1,101,1,101,1,101,1,101,1,101,1,101,1,
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+	0,0,0,1070,1071,1,0,0,0,1071,1073,1,0,0,0,1072,1041,1,0,0,0,1072,1056,1,
+	0,0,0,1072,1065,1,0,0,0,1073,201,1,0,0,0,1074,1075,7,0,0,0,1075,203,1,0,
+	0,0,1076,1077,5,92,0,0,1077,1078,5,108,0,0,1078,1079,5,101,0,0,1079,1080,
+	5,102,0,0,1080,1081,5,116,0,0,1081,1082,1,0,0,0,1082,1083,6,101,1,0,1083,
+	205,1,0,0,0,1084,1085,5,92,0,0,1085,1086,5,114,0,0,1086,1087,5,105,0,0,
+	1087,1088,5,103,0,0,1088,1089,5,104,0,0,1089,1090,5,116,0,0,1090,1091,1,
+	0,0,0,1091,1092,6,102,1,0,1092,207,1,0,0,0,1093,1095,7,7,0,0,1094,1093,
+	1,0,0,0,1095,1096,1,0,0,0,1096,1094,1,0,0,0,1096,1097,1,0,0,0,1097,1098,
+	1,0,0,0,1098,1099,6,103,1,0,1099,209,1,0,0,0,1100,1101,5,92,0,0,1101,1102,
+	5,32,0,0,1102,1103,1,0,0,0,1103,1104,6,104,1,0,1104,211,1,0,0,0,1105,1106,
+	5,92,0,0,1106,1107,5,58,0,0,1107,1108,1,0,0,0,1108,1109,6,105,1,0,1109,
+	213,1,0,0,0,1110,1111,5,160,0,0,1111,1112,1,0,0,0,1112,1113,6,106,1,0,1113,
+	215,1,0,0,0,1114,1115,9,0,0,0,1115,217,1,0,0,0,56,0,1,251,287,300,313,326,
+	354,388,441,443,451,533,546,559,574,588,600,642,648,652,658,661,666,669,
+	671,679,684,689,694,699,704,714,719,723,725,867,907,916,922,927,929,937,
+	940,945,994,1027,1041,1046,1052,1056,1062,1065,1070,1072,1096,3,2,1,0,6,
+	0,0,2,0,0];
 
 	private static __ATN: ATN;
 	public static get _ATN(): ATN {
diff --git a/src/parser/LatexParser.g4 b/src/parser/LatexParser.g4
index 2a5c6fb8..912ccdc7 100644
--- a/src/parser/LatexParser.g4
+++ b/src/parser/LatexParser.g4
@@ -47,6 +47,10 @@ integral_cmd: ((CMD_INT_UNDERSCORE L_BRACE lower_lim_expr=expr R_BRACE) |
     L_PAREN integrand_expr=expr R_PAREN 
     (CMD_MATHRM L_BRACE id R_BRACE | id) L_PAREN id R_PAREN ;
 
+summation_cmd: (CMD_SUM_UNDERSCORE L_BRACE id EQ start_expr=expr R_BRACE) 
+    ((CARET L_BRACE end_expr=expr R_BRACE) | (CARET_SINGLE_CHAR_ID | CARET_SINGLE_CHAR_NUMBER))
+    L_PAREN operand_expr=expr R_PAREN ;
+
 derivative_cmd: CMD_FRAC L_BRACE (MATHRM_0=CMD_MATHRM L_BRACE id R_BRACE | id) R_BRACE L_BRACE 
     (MATHRM_1=CMD_MATHRM L_BRACE id R_BRACE | id) L_PAREN id R_PAREN R_BRACE L_PAREN expr R_PAREN;
 
@@ -90,6 +94,7 @@ expr: <assoc=right> id CARET_SINGLE_CHAR_ID_UNDERSCORE_SUBSCRIPT            #exp
     | integral_cmd                                                          #integral
     | derivative_cmd                                                        #derivative
     | n_derivative_cmd                                                      #nDerivative
+    | summation_cmd                                                         #summation
     | BACKSLASH? CMD_LN L_PAREN expr R_PAREN                                #ln
     | BACKSLASH? CMD_LOG L_PAREN expr R_PAREN                               #log
     | CMD_SLASH_LOG_UNDERSCORE L_BRACE expr R_BRACE L_PAREN expr R_PAREN    #baseLog
@@ -109,6 +114,7 @@ expr: <assoc=right> id CARET_SINGLE_CHAR_ID_UNDERSCORE_SUBSCRIPT            #exp
     | user_function                                                         #userFunction
     | builtin_function                                                      #builtinFunction
     | PI                                                                    #piExpr
+    | INFINITY                                                              #infinityExpr
     | L_PAREN expr R_PAREN                                                  #subExpr
     | expr UNDERSCORE L_BRACE R_BRACE                                       #emptySubscript
     | expr CARET L_BRACE R_BRACE                                            #emptySuperscript
diff --git a/src/parser/LatexParser.ts b/src/parser/LatexParser.ts
index 91bccda2..878a993d 100644
--- a/src/parser/LatexParser.ts
+++ b/src/parser/LatexParser.ts
@@ -31,93 +31,95 @@ export default class LatexParser extends Parser {
 	public static readonly UNDERSCORE = 10;
 	public static readonly EXCLAMATION = 11;
 	public static readonly PI = 12;
-	public static readonly CMD_INT = 13;
-	public static readonly CMD_INT_UNDERSCORE = 14;
-	public static readonly CMD_INT_UNDERSCORE_SINGLE_CHAR_NUMBER = 15;
-	public static readonly CMD_INT_UNDERSCORE_SINGLE_CHAR_ID = 16;
-	public static readonly CMD_MATHRM = 17;
-	public static readonly CMD_FRAC = 18;
-	public static readonly CMD_FRAC_INTS = 19;
-	public static readonly CMD_CDOT = 20;
-	public static readonly CMD_TIMES = 21;
-	public static readonly CMD_SQRT = 22;
-	public static readonly CMD_SQRT_INT = 23;
-	public static readonly CMD_SIM = 24;
-	public static readonly CMD_APPROX = 25;
-	public static readonly CMD_PLACEHOLDER = 26;
-	public static readonly TRANSPOSE = 27;
-	public static readonly BACKSLASH = 28;
-	public static readonly AS_LINES = 29;
-	public static readonly CMD_SIN = 30;
-	public static readonly CMD_COS = 31;
-	public static readonly CMD_TAN = 32;
-	public static readonly CMD_COT = 33;
-	public static readonly CMD_SEC = 34;
-	public static readonly CMD_CSC = 35;
-	public static readonly CMD_ARCSIN = 36;
-	public static readonly CMD_ARCCOS = 37;
-	public static readonly CMD_ARCTAN = 38;
-	public static readonly CMD_SINH = 39;
-	public static readonly CMD_COSH = 40;
-	public static readonly CMD_TANH = 41;
-	public static readonly CMD_COTH = 42;
-	public static readonly CMD_LN = 43;
-	public static readonly CMD_LOG = 44;
-	public static readonly CMD_SLASH_LOG_UNDERSCORE = 45;
-	public static readonly CMD_SLASH_LOG_UNDERSCORE_SINGLE_CHAR_NUMBER = 46;
-	public static readonly CMD_SLASH_LOG_UNDERSCORE_SINGLE_CHAR_ID = 47;
-	public static readonly COMMENT = 48;
-	public static readonly CMD_LEFT = 49;
-	public static readonly CMD_RIGHT = 50;
-	public static readonly DOUBLE_DOLLAR_SIGN = 51;
-	public static readonly ADD = 52;
-	public static readonly SUB = 53;
-	public static readonly CARET = 54;
-	public static readonly EQ = 55;
-	public static readonly LT = 56;
-	public static readonly GT = 57;
-	public static readonly LTE = 58;
-	public static readonly GTE = 59;
-	public static readonly COMMA = 60;
-	public static readonly DECIMAL_POINT = 61;
-	public static readonly CARET_SINGLE_CHAR_NUMBER = 62;
-	public static readonly CARET_SINGLE_CHAR_ID = 63;
-	public static readonly NUMBER = 64;
-	public static readonly BEGIN_MATRIX = 65;
-	public static readonly END_MATRIX = 66;
-	public static readonly AMPERSAND = 67;
-	public static readonly DOUBLE_BACKSLASH = 68;
-	public static readonly UNDERSCORE_SUBSCRIPT = 69;
-	public static readonly CARET_SINGLE_CHAR_ID_UNDERSCORE_SUBSCRIPT = 70;
-	public static readonly ID = 71;
-	public static readonly WS = 72;
-	public static readonly SLASH_SPACE = 73;
-	public static readonly SLASH_COLON = 74;
-	public static readonly NBSP = 75;
-	public static readonly ERROR_CHAR = 76;
-	public static readonly R_BRACKET = 77;
-	public static readonly ALT_R_BRACKET = 78;
-	public static readonly U_CMD_FRAC = 79;
-	public static readonly U_CMD_FRAC_INTS = 80;
-	public static readonly U_CMD_CDOT = 81;
-	public static readonly U_CMD_TIMES = 82;
-	public static readonly U_CMD_SQRT = 83;
-	public static readonly U_COMMA = 84;
-	public static readonly U_CARET = 85;
-	public static readonly U_NAME = 86;
-	public static readonly U_L_PAREN = 87;
-	public static readonly U_R_PAREN = 88;
-	public static readonly U_L_BRACE = 89;
-	public static readonly U_R_BRACE = 90;
-	public static readonly U_ONE = 91;
-	public static readonly U_NUMBER = 92;
-	public static readonly U_CMD_LEFT = 93;
-	public static readonly U_CMD_RIGHT = 94;
-	public static readonly U_WS = 95;
-	public static readonly U_SLASH_SPACE = 96;
-	public static readonly U_SLASH_COLON = 97;
-	public static readonly U_NBSP = 98;
-	public static readonly U_ERROR_CHAR = 99;
+	public static readonly INFINITY = 13;
+	public static readonly CMD_INT = 14;
+	public static readonly CMD_INT_UNDERSCORE = 15;
+	public static readonly CMD_INT_UNDERSCORE_SINGLE_CHAR_NUMBER = 16;
+	public static readonly CMD_INT_UNDERSCORE_SINGLE_CHAR_ID = 17;
+	public static readonly CMD_SUM_UNDERSCORE = 18;
+	public static readonly CMD_MATHRM = 19;
+	public static readonly CMD_FRAC = 20;
+	public static readonly CMD_FRAC_INTS = 21;
+	public static readonly CMD_CDOT = 22;
+	public static readonly CMD_TIMES = 23;
+	public static readonly CMD_SQRT = 24;
+	public static readonly CMD_SQRT_INT = 25;
+	public static readonly CMD_SIM = 26;
+	public static readonly CMD_APPROX = 27;
+	public static readonly CMD_PLACEHOLDER = 28;
+	public static readonly TRANSPOSE = 29;
+	public static readonly BACKSLASH = 30;
+	public static readonly AS_LINES = 31;
+	public static readonly CMD_SIN = 32;
+	public static readonly CMD_COS = 33;
+	public static readonly CMD_TAN = 34;
+	public static readonly CMD_COT = 35;
+	public static readonly CMD_SEC = 36;
+	public static readonly CMD_CSC = 37;
+	public static readonly CMD_ARCSIN = 38;
+	public static readonly CMD_ARCCOS = 39;
+	public static readonly CMD_ARCTAN = 40;
+	public static readonly CMD_SINH = 41;
+	public static readonly CMD_COSH = 42;
+	public static readonly CMD_TANH = 43;
+	public static readonly CMD_COTH = 44;
+	public static readonly CMD_LN = 45;
+	public static readonly CMD_LOG = 46;
+	public static readonly CMD_SLASH_LOG_UNDERSCORE = 47;
+	public static readonly CMD_SLASH_LOG_UNDERSCORE_SINGLE_CHAR_NUMBER = 48;
+	public static readonly CMD_SLASH_LOG_UNDERSCORE_SINGLE_CHAR_ID = 49;
+	public static readonly COMMENT = 50;
+	public static readonly CMD_LEFT = 51;
+	public static readonly CMD_RIGHT = 52;
+	public static readonly DOUBLE_DOLLAR_SIGN = 53;
+	public static readonly ADD = 54;
+	public static readonly SUB = 55;
+	public static readonly CARET = 56;
+	public static readonly EQ = 57;
+	public static readonly LT = 58;
+	public static readonly GT = 59;
+	public static readonly LTE = 60;
+	public static readonly GTE = 61;
+	public static readonly COMMA = 62;
+	public static readonly DECIMAL_POINT = 63;
+	public static readonly CARET_SINGLE_CHAR_NUMBER = 64;
+	public static readonly CARET_SINGLE_CHAR_ID = 65;
+	public static readonly NUMBER = 66;
+	public static readonly BEGIN_MATRIX = 67;
+	public static readonly END_MATRIX = 68;
+	public static readonly AMPERSAND = 69;
+	public static readonly DOUBLE_BACKSLASH = 70;
+	public static readonly UNDERSCORE_SUBSCRIPT = 71;
+	public static readonly CARET_SINGLE_CHAR_ID_UNDERSCORE_SUBSCRIPT = 72;
+	public static readonly ID = 73;
+	public static readonly WS = 74;
+	public static readonly SLASH_SPACE = 75;
+	public static readonly SLASH_COLON = 76;
+	public static readonly NBSP = 77;
+	public static readonly ERROR_CHAR = 78;
+	public static readonly R_BRACKET = 79;
+	public static readonly ALT_R_BRACKET = 80;
+	public static readonly U_CMD_FRAC = 81;
+	public static readonly U_CMD_FRAC_INTS = 82;
+	public static readonly U_CMD_CDOT = 83;
+	public static readonly U_CMD_TIMES = 84;
+	public static readonly U_CMD_SQRT = 85;
+	public static readonly U_COMMA = 86;
+	public static readonly U_CARET = 87;
+	public static readonly U_NAME = 88;
+	public static readonly U_L_PAREN = 89;
+	public static readonly U_R_PAREN = 90;
+	public static readonly U_L_BRACE = 91;
+	public static readonly U_R_BRACE = 92;
+	public static readonly U_ONE = 93;
+	public static readonly U_NUMBER = 94;
+	public static readonly U_CMD_LEFT = 95;
+	public static readonly U_CMD_RIGHT = 96;
+	public static readonly U_WS = 97;
+	public static readonly U_SLASH_SPACE = 98;
+	public static readonly U_SLASH_COLON = 99;
+	public static readonly U_NBSP = 100;
+	public static readonly U_ERROR_CHAR = 101;
 	public static readonly EOF = Token.EOF;
 	public static readonly RULE_statement = 0;
 	public static readonly RULE_scatter_plot_query = 1;
@@ -136,23 +138,24 @@ export default class LatexParser extends Parser {
 	public static readonly RULE_trig_function = 14;
 	public static readonly RULE_indefinite_integral_cmd = 15;
 	public static readonly RULE_integral_cmd = 16;
-	public static readonly RULE_derivative_cmd = 17;
-	public static readonly RULE_n_derivative_cmd = 18;
-	public static readonly RULE_argument = 19;
-	public static readonly RULE_condition = 20;
-	public static readonly RULE_id_list = 21;
-	public static readonly RULE_guess = 22;
-	public static readonly RULE_guess_list = 23;
-	public static readonly RULE_condition_single = 24;
-	public static readonly RULE_condition_chain = 25;
-	public static readonly RULE_matrix_row = 26;
-	public static readonly RULE_user_function = 27;
-	public static readonly RULE_builtin_function = 28;
-	public static readonly RULE_expr = 29;
-	public static readonly RULE_u_block = 30;
-	public static readonly RULE_u_insert_matrix = 31;
-	public static readonly RULE_u_fraction = 32;
-	public static readonly RULE_u_expr = 33;
+	public static readonly RULE_summation_cmd = 17;
+	public static readonly RULE_derivative_cmd = 18;
+	public static readonly RULE_n_derivative_cmd = 19;
+	public static readonly RULE_argument = 20;
+	public static readonly RULE_condition = 21;
+	public static readonly RULE_id_list = 22;
+	public static readonly RULE_guess = 23;
+	public static readonly RULE_guess_list = 24;
+	public static readonly RULE_condition_single = 25;
+	public static readonly RULE_condition_chain = 26;
+	public static readonly RULE_matrix_row = 27;
+	public static readonly RULE_user_function = 28;
+	public static readonly RULE_builtin_function = 29;
+	public static readonly RULE_expr = 30;
+	public static readonly RULE_u_block = 31;
+	public static readonly RULE_u_insert_matrix = 32;
+	public static readonly RULE_u_fraction = 33;
+	public static readonly RULE_u_expr = 34;
 	public static readonly literalNames: (string | null)[] = [ null, "'['", 
                                                             "'\\lbrack'", 
                                                             "';'", null, 
@@ -160,9 +163,10 @@ export default class LatexParser extends Parser {
                                                             null, "'|'", 
                                                             null, "'_'", 
                                                             "'!'", "'\\pi'", 
+                                                            "'\\infty'", 
                                                             "'\\int'", null, 
                                                             null, null, 
-                                                            "'\\mathrm'", 
+                                                            null, "'\\mathrm'", 
                                                             null, null, 
                                                             null, null, 
                                                             null, null, 
@@ -216,10 +220,12 @@ export default class LatexParser extends Parser {
                                                              "VBAR", "DOUBLE_VBAR", 
                                                              "UNDERSCORE", 
                                                              "EXCLAMATION", 
-                                                             "PI", "CMD_INT", 
+                                                             "PI", "INFINITY", 
+                                                             "CMD_INT", 
                                                              "CMD_INT_UNDERSCORE", 
                                                              "CMD_INT_UNDERSCORE_SINGLE_CHAR_NUMBER", 
                                                              "CMD_INT_UNDERSCORE_SINGLE_CHAR_ID", 
+                                                             "CMD_SUM_UNDERSCORE", 
                                                              "CMD_MATHRM", 
                                                              "CMD_FRAC", 
                                                              "CMD_FRAC_INTS", 
@@ -295,10 +301,11 @@ export default class LatexParser extends Parser {
 		"statement", "scatter_plot_query", "parametric_plot_query", "insert_matrix", 
 		"id", "number", "number_with_units", "assign", "assign_list", "assign_plus_query", 
 		"query", "equality", "piecewise_assign", "piecewise_arg", "trig_function", 
-		"indefinite_integral_cmd", "integral_cmd", "derivative_cmd", "n_derivative_cmd", 
-		"argument", "condition", "id_list", "guess", "guess_list", "condition_single", 
-		"condition_chain", "matrix_row", "user_function", "builtin_function", 
-		"expr", "u_block", "u_insert_matrix", "u_fraction", "u_expr",
+		"indefinite_integral_cmd", "integral_cmd", "summation_cmd", "derivative_cmd", 
+		"n_derivative_cmd", "argument", "condition", "id_list", "guess", "guess_list", 
+		"condition_single", "condition_chain", "matrix_row", "user_function", 
+		"builtin_function", "expr", "u_block", "u_insert_matrix", "u_fraction", 
+		"u_expr",
 	];
 	public get grammarFileName(): string { return "LatexParser.g4"; }
 	public get literalNames(): (string | null)[] { return LatexParser.literalNames; }
@@ -321,113 +328,113 @@ export default class LatexParser extends Parser {
 		try {
 			this.enterOuterAlt(localctx, 1);
 			{
-			this.state = 85;
+			this.state = 87;
 			this._errHandler.sync(this);
 			switch ( this._interp.adaptivePredict(this._input, 0, this._ctx) ) {
 			case 1:
 				{
-				this.state = 68;
+				this.state = 70;
 				this.assign();
 				}
 				break;
 			case 2:
 				{
-				this.state = 69;
+				this.state = 71;
 				this.assign_list();
 				}
 				break;
 			case 3:
 				{
-				this.state = 70;
+				this.state = 72;
 				this.assign_plus_query();
 				}
 				break;
 			case 4:
 				{
-				this.state = 71;
+				this.state = 73;
 				this.query();
 				}
 				break;
 			case 5:
 				{
-				this.state = 72;
+				this.state = 74;
 				this.equality();
 				}
 				break;
 			case 6:
 				{
-				this.state = 73;
+				this.state = 75;
 				this.u_block();
 				}
 				break;
 			case 7:
 				{
-				this.state = 74;
+				this.state = 76;
 				this.number_();
 				}
 				break;
 			case 8:
 				{
-				this.state = 75;
+				this.state = 77;
 				this.id();
 				}
 				break;
 			case 9:
 				{
-				this.state = 76;
+				this.state = 78;
 				this.id_list();
 				}
 				break;
 			case 10:
 				{
-				this.state = 77;
+				this.state = 79;
 				this.guess();
 				}
 				break;
 			case 11:
 				{
-				this.state = 78;
+				this.state = 80;
 				this.guess_list();
 				}
 				break;
 			case 12:
 				{
-				this.state = 79;
+				this.state = 81;
 				this.expr(0);
 				}
 				break;
 			case 13:
 				{
-				this.state = 80;
+				this.state = 82;
 				this.condition();
 				}
 				break;
 			case 14:
 				{
-				this.state = 81;
+				this.state = 83;
 				this.piecewise_assign();
 				}
 				break;
 			case 15:
 				{
-				this.state = 82;
+				this.state = 84;
 				this.insert_matrix();
 				}
 				break;
 			case 16:
 				{
-				this.state = 83;
+				this.state = 85;
 				this.scatter_plot_query();
 				}
 				break;
 			case 17:
 				{
-				this.state = 84;
+				this.state = 86;
 				this.parametric_plot_query();
 				}
 				break;
 			}
-			this.state = 87;
+			this.state = 89;
 			this.match(LatexParser.EOF);
 			}
 		}
@@ -453,21 +460,21 @@ export default class LatexParser extends Parser {
 		try {
 			this.enterOuterAlt(localctx, 1);
 			{
-			this.state = 99;
+			this.state = 101;
 			this._errHandler.sync(this);
 			switch ( this._interp.adaptivePredict(this._input, 1, this._ctx) ) {
 			case 1:
 				{
 				{
-				this.state = 89;
-				this.match(LatexParser.L_PAREN);
-				this.state = 90;
-				this.expr(0);
 				this.state = 91;
-				this.match(LatexParser.COMMA);
+				this.match(LatexParser.L_PAREN);
 				this.state = 92;
 				this.expr(0);
 				this.state = 93;
+				this.match(LatexParser.COMMA);
+				this.state = 94;
+				this.expr(0);
+				this.state = 95;
 				this.match(LatexParser.R_PAREN);
 				}
 				}
@@ -475,43 +482,43 @@ export default class LatexParser extends Parser {
 			case 2:
 				{
 				{
-				this.state = 95;
+				this.state = 97;
 				this.expr(0);
-				this.state = 96;
+				this.state = 98;
 				this.match(LatexParser.COMMA);
-				this.state = 97;
+				this.state = 99;
 				this.expr(0);
 				}
 				}
 				break;
 			}
-			this.state = 102;
+			this.state = 104;
 			this._errHandler.sync(this);
 			_la = this._input.LA(1);
-			if (_la===29) {
+			if (_la===31) {
 				{
-				this.state = 101;
+				this.state = 103;
 				this.match(LatexParser.AS_LINES);
 				}
 			}
 
-			this.state = 104;
+			this.state = 106;
 			this.match(LatexParser.EQ);
-			this.state = 115;
+			this.state = 117;
 			this._errHandler.sync(this);
 			switch (this._input.LA(1)) {
 			case 6:
 				{
 				{
-				this.state = 105;
-				this.match(LatexParser.L_PAREN);
-				this.state = 106;
-				this.u_block();
 				this.state = 107;
-				this.match(LatexParser.COMMA);
+				this.match(LatexParser.L_PAREN);
 				this.state = 108;
 				this.u_block();
 				this.state = 109;
+				this.match(LatexParser.COMMA);
+				this.state = 110;
+				this.u_block();
+				this.state = 111;
 				this.match(LatexParser.R_PAREN);
 				}
 				}
@@ -520,11 +527,11 @@ export default class LatexParser extends Parser {
 			case 2:
 				{
 				{
-				this.state = 111;
+				this.state = 113;
 				this.u_block();
-				this.state = 112;
+				this.state = 114;
 				this.match(LatexParser.COMMA);
-				this.state = 113;
+				this.state = 115;
 				this.u_block();
 				}
 				}
@@ -559,56 +566,56 @@ export default class LatexParser extends Parser {
 			this.enterOuterAlt(localctx, 1);
 			{
 			{
-			this.state = 117;
-			this.match(LatexParser.L_PAREN);
-			this.state = 118;
-			this.expr(0);
 			this.state = 119;
-			this.match(LatexParser.COMMA);
+			this.match(LatexParser.L_PAREN);
 			this.state = 120;
 			this.expr(0);
 			this.state = 121;
+			this.match(LatexParser.COMMA);
+			this.state = 122;
+			this.expr(0);
+			this.state = 123;
 			this.match(LatexParser.R_PAREN);
 			}
-			this.state = 123;
+			this.state = 125;
 			localctx._for_id = this.match(LatexParser.ID);
-			this.state = 124;
+			this.state = 126;
 			this.match(LatexParser.L_PAREN);
-			this.state = 125;
+			this.state = 127;
 			this.argument();
-			this.state = 126;
+			this.state = 128;
 			this.match(LatexParser.R_PAREN);
-			this.state = 131;
+			this.state = 133;
 			this._errHandler.sync(this);
 			_la = this._input.LA(1);
-			if (_la===71) {
+			if (_la===73) {
 				{
-				this.state = 127;
+				this.state = 129;
 				localctx._points_id_0 = this.match(LatexParser.ID);
-				this.state = 128;
+				this.state = 130;
 				localctx._num_points = this.number_();
-				this.state = 129;
+				this.state = 131;
 				localctx._points_id_1 = this.match(LatexParser.ID);
 				}
 			}
 
-			this.state = 133;
+			this.state = 135;
 			this.match(LatexParser.EQ);
-			this.state = 144;
+			this.state = 146;
 			this._errHandler.sync(this);
 			switch (this._input.LA(1)) {
 			case 6:
 				{
 				{
-				this.state = 134;
-				this.match(LatexParser.L_PAREN);
-				this.state = 135;
-				this.u_block();
 				this.state = 136;
-				this.match(LatexParser.COMMA);
+				this.match(LatexParser.L_PAREN);
 				this.state = 137;
 				this.u_block();
 				this.state = 138;
+				this.match(LatexParser.COMMA);
+				this.state = 139;
+				this.u_block();
+				this.state = 140;
 				this.match(LatexParser.R_PAREN);
 				}
 				}
@@ -617,11 +624,11 @@ export default class LatexParser extends Parser {
 			case 2:
 				{
 				{
-				this.state = 140;
+				this.state = 142;
 				this.u_block();
-				this.state = 141;
+				this.state = 143;
 				this.match(LatexParser.COMMA);
-				this.state = 142;
+				this.state = 144;
 				this.u_block();
 				}
 				}
@@ -656,49 +663,49 @@ export default class LatexParser extends Parser {
 			let _alt: number;
 			this.enterOuterAlt(localctx, 1);
 			{
-			this.state = 149;
+			this.state = 151;
 			this._errHandler.sync(this);
 			_alt = this._interp.adaptivePredict(this._input, 6, this._ctx);
 			while (_alt !== 1 && _alt !== ATN.INVALID_ALT_NUMBER) {
 				if (_alt === 1 + 1) {
 					{
 					{
-					this.state = 146;
+					this.state = 148;
 					this.matchWildcard();
 					}
 					}
 				}
-				this.state = 151;
+				this.state = 153;
 				this._errHandler.sync(this);
 				_alt = this._interp.adaptivePredict(this._input, 6, this._ctx);
 			}
-			this.state = 159;
+			this.state = 161;
 			this._errHandler.sync(this);
 			_la = this._input.LA(1);
 			do {
 				{
 				{
-				this.state = 152;
+				this.state = 154;
 				this.u_insert_matrix();
-				this.state = 156;
+				this.state = 158;
 				this._errHandler.sync(this);
 				_alt = this._interp.adaptivePredict(this._input, 7, this._ctx);
 				while (_alt !== 1 && _alt !== ATN.INVALID_ALT_NUMBER) {
 					if (_alt === 1 + 1) {
 						{
 						{
-						this.state = 153;
+						this.state = 155;
 						this.matchWildcard();
 						}
 						}
 					}
-					this.state = 158;
+					this.state = 160;
 					this._errHandler.sync(this);
 					_alt = this._interp.adaptivePredict(this._input, 7, this._ctx);
 				}
 				}
 				}
-				this.state = 161;
+				this.state = 163;
 				this._errHandler.sync(this);
 				_la = this._input.LA(1);
 			} while (_la===1 || _la===2);
@@ -725,7 +732,7 @@ export default class LatexParser extends Parser {
 		try {
 			this.enterOuterAlt(localctx, 1);
 			{
-			this.state = 163;
+			this.state = 165;
 			this.match(LatexParser.ID);
 			}
 		}
@@ -751,17 +758,17 @@ export default class LatexParser extends Parser {
 		try {
 			this.enterOuterAlt(localctx, 1);
 			{
-			this.state = 166;
+			this.state = 168;
 			this._errHandler.sync(this);
 			_la = this._input.LA(1);
-			if (_la===53) {
+			if (_la===55) {
 				{
-				this.state = 165;
+				this.state = 167;
 				this.match(LatexParser.SUB);
 				}
 			}
 
-			this.state = 168;
+			this.state = 170;
 			this.match(LatexParser.NUMBER);
 			}
 		}
@@ -786,32 +793,32 @@ export default class LatexParser extends Parser {
 		try {
 			this.enterOuterAlt(localctx, 1);
 			{
-			this.state = 173;
+			this.state = 175;
 			this._errHandler.sync(this);
 			switch (this._input.LA(1)) {
-			case 53:
-			case 64:
+			case 55:
+			case 66:
 				{
-				this.state = 170;
+				this.state = 172;
 				this.number_();
 				}
 				break;
 			case 12:
 				{
-				this.state = 171;
+				this.state = 173;
 				this.match(LatexParser.PI);
 				}
 				break;
-			case 71:
+			case 73:
 				{
-				this.state = 172;
+				this.state = 174;
 				this.id();
 				}
 				break;
 			default:
 				throw new NoViableAltException(this);
 			}
-			this.state = 175;
+			this.state = 177;
 			this.u_block();
 			}
 		}
@@ -836,27 +843,27 @@ export default class LatexParser extends Parser {
 		try {
 			this.enterOuterAlt(localctx, 1);
 			{
-			this.state = 179;
+			this.state = 181;
 			this._errHandler.sync(this);
 			switch (this._input.LA(1)) {
-			case 71:
+			case 73:
 				{
-				this.state = 177;
+				this.state = 179;
 				this.id();
 				}
 				break;
 			case 12:
 				{
-				this.state = 178;
+				this.state = 180;
 				this.match(LatexParser.PI);
 				}
 				break;
 			default:
 				throw new NoViableAltException(this);
 			}
-			this.state = 181;
+			this.state = 183;
 			this.match(LatexParser.EQ);
-			this.state = 182;
+			this.state = 184;
 			this.expr(0);
 			}
 		}
@@ -882,24 +889,24 @@ export default class LatexParser extends Parser {
 		try {
 			this.enterOuterAlt(localctx, 1);
 			{
-			this.state = 184;
+			this.state = 186;
 			this.assign();
-			this.state = 187;
+			this.state = 189;
 			this._errHandler.sync(this);
 			_la = this._input.LA(1);
 			do {
 				{
 				{
-				this.state = 185;
+				this.state = 187;
 				this.match(LatexParser.COMMA);
-				this.state = 186;
+				this.state = 188;
 				this.assign();
 				}
 				}
-				this.state = 189;
+				this.state = 191;
 				this._errHandler.sync(this);
 				_la = this._input.LA(1);
-			} while (_la===60);
+			} while (_la===62);
 			}
 		}
 		catch (re) {
@@ -924,16 +931,16 @@ export default class LatexParser extends Parser {
 		try {
 			this.enterOuterAlt(localctx, 1);
 			{
-			this.state = 191;
+			this.state = 193;
 			this.assign();
-			this.state = 192;
-			this.match(LatexParser.EQ);
 			this.state = 194;
+			this.match(LatexParser.EQ);
+			this.state = 196;
 			this._errHandler.sync(this);
 			_la = this._input.LA(1);
 			if (_la===1 || _la===2) {
 				{
-				this.state = 193;
+				this.state = 195;
 				this.u_block();
 				}
 			}
@@ -962,16 +969,16 @@ export default class LatexParser extends Parser {
 		try {
 			this.enterOuterAlt(localctx, 1);
 			{
-			this.state = 196;
+			this.state = 198;
 			this.expr(0);
-			this.state = 197;
-			this.match(LatexParser.EQ);
 			this.state = 199;
+			this.match(LatexParser.EQ);
+			this.state = 201;
 			this._errHandler.sync(this);
 			_la = this._input.LA(1);
 			if (_la===1 || _la===2) {
 				{
-				this.state = 198;
+				this.state = 200;
 				this.u_block();
 				}
 			}
@@ -999,11 +1006,11 @@ export default class LatexParser extends Parser {
 		try {
 			this.enterOuterAlt(localctx, 1);
 			{
-			this.state = 201;
+			this.state = 203;
 			this.expr(0);
-			this.state = 202;
+			this.state = 204;
 			this.match(LatexParser.EQ);
-			this.state = 203;
+			this.state = 205;
 			this.expr(0);
 			}
 		}
@@ -1029,51 +1036,51 @@ export default class LatexParser extends Parser {
 		try {
 			this.enterOuterAlt(localctx, 1);
 			{
-			this.state = 207;
+			this.state = 209;
 			this._errHandler.sync(this);
 			switch (this._input.LA(1)) {
-			case 71:
+			case 73:
 				{
-				this.state = 205;
+				this.state = 207;
 				this.id();
 				}
 				break;
 			case 12:
 				{
-				this.state = 206;
+				this.state = 208;
 				this.match(LatexParser.PI);
 				}
 				break;
 			default:
 				throw new NoViableAltException(this);
 			}
-			this.state = 209;
+			this.state = 211;
 			this.match(LatexParser.EQ);
-			this.state = 210;
+			this.state = 212;
 			this.id();
-			this.state = 211;
+			this.state = 213;
 			this.match(LatexParser.L_PAREN);
 			{
-			this.state = 212;
+			this.state = 214;
 			this.piecewise_arg();
-			this.state = 217;
+			this.state = 219;
 			this._errHandler.sync(this);
 			_la = this._input.LA(1);
-			while (_la===60) {
+			while (_la===62) {
 				{
 				{
-				this.state = 213;
+				this.state = 215;
 				this.match(LatexParser.COMMA);
-				this.state = 214;
+				this.state = 216;
 				this.piecewise_arg();
 				}
 				}
-				this.state = 219;
+				this.state = 221;
 				this._errHandler.sync(this);
 				_la = this._input.LA(1);
 			}
 			}
-			this.state = 220;
+			this.state = 222;
 			this.match(LatexParser.R_PAREN);
 			}
 		}
@@ -1098,15 +1105,15 @@ export default class LatexParser extends Parser {
 		try {
 			this.enterOuterAlt(localctx, 1);
 			{
-			this.state = 222;
+			this.state = 224;
 			this.match(LatexParser.L_PAREN);
-			this.state = 223;
+			this.state = 225;
 			this.expr(0);
-			this.state = 224;
+			this.state = 226;
 			this.match(LatexParser.COMMA);
-			this.state = 225;
+			this.state = 227;
 			this.condition();
-			this.state = 226;
+			this.state = 228;
 			this.match(LatexParser.R_PAREN);
 			}
 		}
@@ -1132,30 +1139,30 @@ export default class LatexParser extends Parser {
 		try {
 			this.enterOuterAlt(localctx, 1);
 			{
-			this.state = 229;
+			this.state = 231;
 			this._errHandler.sync(this);
 			_la = this._input.LA(1);
-			if (_la===28) {
+			if (_la===30) {
 				{
-				this.state = 228;
+				this.state = 230;
 				this.match(LatexParser.BACKSLASH);
 				}
 			}
 
-			this.state = 231;
+			this.state = 233;
 			_la = this._input.LA(1);
-			if(!(((((_la - 30)) & ~0x1F) === 0 && ((1 << (_la - 30)) & 8191) !== 0))) {
+			if(!(((((_la - 32)) & ~0x1F) === 0 && ((1 << (_la - 32)) & 8191) !== 0))) {
 			this._errHandler.recoverInline(this);
 			}
 			else {
 				this._errHandler.reportMatch(this);
 			    this.consume();
 			}
-			this.state = 232;
+			this.state = 234;
 			this.match(LatexParser.L_PAREN);
-			this.state = 233;
+			this.state = 235;
 			this.expr(0);
-			this.state = 234;
+			this.state = 236;
 			this.match(LatexParser.R_PAREN);
 			}
 		}
@@ -1180,29 +1187,29 @@ export default class LatexParser extends Parser {
 		try {
 			this.enterOuterAlt(localctx, 1);
 			{
-			this.state = 243;
+			this.state = 245;
 			this._errHandler.sync(this);
 			switch (this._input.LA(1)) {
-			case 13:
+			case 14:
 				{
-				this.state = 236;
+				this.state = 238;
 				this.match(LatexParser.CMD_INT);
 				}
 				break;
-			case 14:
+			case 15:
 				{
 				{
-				this.state = 237;
+				this.state = 239;
 				this.match(LatexParser.CMD_INT_UNDERSCORE);
-				this.state = 238;
+				this.state = 240;
 				this.match(LatexParser.L_BRACE);
-				this.state = 239;
+				this.state = 241;
 				this.match(LatexParser.R_BRACE);
-				this.state = 240;
+				this.state = 242;
 				this.match(LatexParser.CARET);
-				this.state = 241;
+				this.state = 243;
 				this.match(LatexParser.L_BRACE);
-				this.state = 242;
+				this.state = 244;
 				this.match(LatexParser.R_BRACE);
 				}
 				}
@@ -1210,41 +1217,41 @@ export default class LatexParser extends Parser {
 			default:
 				throw new NoViableAltException(this);
 			}
-			this.state = 245;
+			this.state = 247;
 			this.match(LatexParser.L_PAREN);
-			this.state = 246;
+			this.state = 248;
 			this.expr(0);
-			this.state = 247;
+			this.state = 249;
 			this.match(LatexParser.R_PAREN);
-			this.state = 254;
+			this.state = 256;
 			this._errHandler.sync(this);
 			switch (this._input.LA(1)) {
-			case 17:
+			case 19:
 				{
-				this.state = 248;
+				this.state = 250;
 				this.match(LatexParser.CMD_MATHRM);
-				this.state = 249;
+				this.state = 251;
 				this.match(LatexParser.L_BRACE);
-				this.state = 250;
+				this.state = 252;
 				this.id();
-				this.state = 251;
+				this.state = 253;
 				this.match(LatexParser.R_BRACE);
 				}
 				break;
-			case 71:
+			case 73:
 				{
-				this.state = 253;
+				this.state = 255;
 				this.id();
 				}
 				break;
 			default:
 				throw new NoViableAltException(this);
 			}
-			this.state = 256;
+			this.state = 258;
 			this.match(LatexParser.L_PAREN);
-			this.state = 257;
+			this.state = 259;
 			this.id();
-			this.state = 258;
+			this.state = 260;
 			this.match(LatexParser.R_PAREN);
 			}
 		}
@@ -1270,29 +1277,29 @@ export default class LatexParser extends Parser {
 		try {
 			this.enterOuterAlt(localctx, 1);
 			{
-			this.state = 266;
+			this.state = 268;
 			this._errHandler.sync(this);
 			switch (this._input.LA(1)) {
-			case 14:
+			case 15:
 				{
 				{
-				this.state = 260;
+				this.state = 262;
 				this.match(LatexParser.CMD_INT_UNDERSCORE);
-				this.state = 261;
+				this.state = 263;
 				this.match(LatexParser.L_BRACE);
-				this.state = 262;
+				this.state = 264;
 				localctx._lower_lim_expr = this.expr(0);
-				this.state = 263;
+				this.state = 265;
 				this.match(LatexParser.R_BRACE);
 				}
 				}
 				break;
-			case 15:
 			case 16:
+			case 17:
 				{
-				this.state = 265;
+				this.state = 267;
 				_la = this._input.LA(1);
-				if(!(_la===15 || _la===16)) {
+				if(!(_la===16 || _la===17)) {
 				this._errHandler.recoverInline(this);
 				}
 				else {
@@ -1304,29 +1311,29 @@ export default class LatexParser extends Parser {
 			default:
 				throw new NoViableAltException(this);
 			}
-			this.state = 274;
+			this.state = 276;
 			this._errHandler.sync(this);
 			switch (this._input.LA(1)) {
-			case 54:
+			case 56:
 				{
 				{
-				this.state = 268;
+				this.state = 270;
 				this.match(LatexParser.CARET);
-				this.state = 269;
+				this.state = 271;
 				this.match(LatexParser.L_BRACE);
-				this.state = 270;
+				this.state = 272;
 				localctx._upper_lim_expr = this.expr(0);
-				this.state = 271;
+				this.state = 273;
 				this.match(LatexParser.R_BRACE);
 				}
 				}
 				break;
-			case 62:
-			case 63:
+			case 64:
+			case 65:
 				{
-				this.state = 273;
+				this.state = 275;
 				_la = this._input.LA(1);
-				if(!(_la===62 || _la===63)) {
+				if(!(_la===64 || _la===65)) {
 				this._errHandler.recoverInline(this);
 				}
 				else {
@@ -1338,41 +1345,119 @@ export default class LatexParser extends Parser {
 			default:
 				throw new NoViableAltException(this);
 			}
-			this.state = 276;
+			this.state = 278;
 			this.match(LatexParser.L_PAREN);
-			this.state = 277;
+			this.state = 279;
 			localctx._integrand_expr = this.expr(0);
-			this.state = 278;
+			this.state = 280;
 			this.match(LatexParser.R_PAREN);
-			this.state = 285;
+			this.state = 287;
 			this._errHandler.sync(this);
 			switch (this._input.LA(1)) {
-			case 17:
+			case 19:
 				{
-				this.state = 279;
+				this.state = 281;
 				this.match(LatexParser.CMD_MATHRM);
-				this.state = 280;
+				this.state = 282;
 				this.match(LatexParser.L_BRACE);
-				this.state = 281;
+				this.state = 283;
 				this.id();
-				this.state = 282;
+				this.state = 284;
 				this.match(LatexParser.R_BRACE);
 				}
 				break;
-			case 71:
+			case 73:
 				{
-				this.state = 284;
+				this.state = 286;
 				this.id();
 				}
 				break;
 			default:
 				throw new NoViableAltException(this);
 			}
-			this.state = 287;
+			this.state = 289;
 			this.match(LatexParser.L_PAREN);
-			this.state = 288;
+			this.state = 290;
 			this.id();
-			this.state = 289;
+			this.state = 291;
+			this.match(LatexParser.R_PAREN);
+			}
+		}
+		catch (re) {
+			if (re instanceof RecognitionException) {
+				localctx.exception = re;
+				this._errHandler.reportError(this, re);
+				this._errHandler.recover(this, re);
+			} else {
+				throw re;
+			}
+		}
+		finally {
+			this.exitRule();
+		}
+		return localctx;
+	}
+	// @RuleVersion(0)
+	public summation_cmd(): Summation_cmdContext {
+		let localctx: Summation_cmdContext = new Summation_cmdContext(this, this._ctx, this.state);
+		this.enterRule(localctx, 34, LatexParser.RULE_summation_cmd);
+		let _la: number;
+		try {
+			this.enterOuterAlt(localctx, 1);
+			{
+			{
+			this.state = 293;
+			this.match(LatexParser.CMD_SUM_UNDERSCORE);
+			this.state = 294;
+			this.match(LatexParser.L_BRACE);
+			this.state = 295;
+			this.id();
+			this.state = 296;
+			this.match(LatexParser.EQ);
+			this.state = 297;
+			localctx._start_expr = this.expr(0);
+			this.state = 298;
+			this.match(LatexParser.R_BRACE);
+			}
+			this.state = 306;
+			this._errHandler.sync(this);
+			switch (this._input.LA(1)) {
+			case 56:
+				{
+				{
+				this.state = 300;
+				this.match(LatexParser.CARET);
+				this.state = 301;
+				this.match(LatexParser.L_BRACE);
+				this.state = 302;
+				localctx._end_expr = this.expr(0);
+				this.state = 303;
+				this.match(LatexParser.R_BRACE);
+				}
+				}
+				break;
+			case 64:
+			case 65:
+				{
+				this.state = 305;
+				_la = this._input.LA(1);
+				if(!(_la===64 || _la===65)) {
+				this._errHandler.recoverInline(this);
+				}
+				else {
+					this._errHandler.reportMatch(this);
+				    this.consume();
+				}
+				}
+				break;
+			default:
+				throw new NoViableAltException(this);
+			}
+			this.state = 308;
+			this.match(LatexParser.L_PAREN);
+			this.state = 309;
+			localctx._operand_expr = this.expr(0);
+			this.state = 310;
 			this.match(LatexParser.R_PAREN);
 			}
 		}
@@ -1393,79 +1478,79 @@ export default class LatexParser extends Parser {
 	// @RuleVersion(0)
 	public derivative_cmd(): Derivative_cmdContext {
 		let localctx: Derivative_cmdContext = new Derivative_cmdContext(this, this._ctx, this.state);
-		this.enterRule(localctx, 34, LatexParser.RULE_derivative_cmd);
+		this.enterRule(localctx, 36, LatexParser.RULE_derivative_cmd);
 		try {
 			this.enterOuterAlt(localctx, 1);
 			{
-			this.state = 291;
+			this.state = 312;
 			this.match(LatexParser.CMD_FRAC);
-			this.state = 292;
+			this.state = 313;
 			this.match(LatexParser.L_BRACE);
-			this.state = 299;
+			this.state = 320;
 			this._errHandler.sync(this);
 			switch (this._input.LA(1)) {
-			case 17:
+			case 19:
 				{
-				this.state = 293;
+				this.state = 314;
 				localctx._MATHRM_0 = this.match(LatexParser.CMD_MATHRM);
-				this.state = 294;
+				this.state = 315;
 				this.match(LatexParser.L_BRACE);
-				this.state = 295;
+				this.state = 316;
 				this.id();
-				this.state = 296;
+				this.state = 317;
 				this.match(LatexParser.R_BRACE);
 				}
 				break;
-			case 71:
+			case 73:
 				{
-				this.state = 298;
+				this.state = 319;
 				this.id();
 				}
 				break;
 			default:
 				throw new NoViableAltException(this);
 			}
-			this.state = 301;
+			this.state = 322;
 			this.match(LatexParser.R_BRACE);
-			this.state = 302;
+			this.state = 323;
 			this.match(LatexParser.L_BRACE);
-			this.state = 309;
+			this.state = 330;
 			this._errHandler.sync(this);
 			switch (this._input.LA(1)) {
-			case 17:
+			case 19:
 				{
-				this.state = 303;
+				this.state = 324;
 				localctx._MATHRM_1 = this.match(LatexParser.CMD_MATHRM);
-				this.state = 304;
+				this.state = 325;
 				this.match(LatexParser.L_BRACE);
-				this.state = 305;
+				this.state = 326;
 				this.id();
-				this.state = 306;
+				this.state = 327;
 				this.match(LatexParser.R_BRACE);
 				}
 				break;
-			case 71:
+			case 73:
 				{
-				this.state = 308;
+				this.state = 329;
 				this.id();
 				}
 				break;
 			default:
 				throw new NoViableAltException(this);
 			}
-			this.state = 311;
+			this.state = 332;
 			this.match(LatexParser.L_PAREN);
-			this.state = 312;
+			this.state = 333;
 			this.id();
-			this.state = 313;
+			this.state = 334;
 			this.match(LatexParser.R_PAREN);
-			this.state = 314;
+			this.state = 335;
 			this.match(LatexParser.R_BRACE);
-			this.state = 315;
+			this.state = 336;
 			this.match(LatexParser.L_PAREN);
-			this.state = 316;
+			this.state = 337;
 			this.expr(0);
-			this.state = 317;
+			this.state = 338;
 			this.match(LatexParser.R_PAREN);
 			}
 		}
@@ -1486,131 +1571,131 @@ export default class LatexParser extends Parser {
 	// @RuleVersion(0)
 	public n_derivative_cmd(): N_derivative_cmdContext {
 		let localctx: N_derivative_cmdContext = new N_derivative_cmdContext(this, this._ctx, this.state);
-		this.enterRule(localctx, 36, LatexParser.RULE_n_derivative_cmd);
+		this.enterRule(localctx, 38, LatexParser.RULE_n_derivative_cmd);
 		try {
 			this.enterOuterAlt(localctx, 1);
 			{
-			this.state = 319;
+			this.state = 340;
 			this.match(LatexParser.CMD_FRAC);
-			this.state = 320;
+			this.state = 341;
 			this.match(LatexParser.L_BRACE);
-			this.state = 327;
+			this.state = 348;
 			this._errHandler.sync(this);
 			switch (this._input.LA(1)) {
-			case 17:
+			case 19:
 				{
-				this.state = 321;
+				this.state = 342;
 				localctx._MATHRM_0 = this.match(LatexParser.CMD_MATHRM);
-				this.state = 322;
+				this.state = 343;
 				this.match(LatexParser.L_BRACE);
-				this.state = 323;
+				this.state = 344;
 				this.id();
-				this.state = 324;
+				this.state = 345;
 				this.match(LatexParser.R_BRACE);
 				}
 				break;
-			case 71:
+			case 73:
 				{
-				this.state = 326;
+				this.state = 347;
 				this.id();
 				}
 				break;
 			default:
 				throw new NoViableAltException(this);
 			}
-			this.state = 335;
+			this.state = 356;
 			this._errHandler.sync(this);
 			switch (this._input.LA(1)) {
-			case 54:
+			case 56:
 				{
 				{
-				this.state = 329;
+				this.state = 350;
 				this.match(LatexParser.CARET);
-				this.state = 330;
+				this.state = 351;
 				this.match(LatexParser.L_BRACE);
-				this.state = 331;
+				this.state = 352;
 				this.number_();
-				this.state = 332;
+				this.state = 353;
 				this.match(LatexParser.R_BRACE);
 				}
 				}
 				break;
-			case 62:
+			case 64:
 				{
-				this.state = 334;
+				this.state = 355;
 				localctx._single_char_exp1 = this.match(LatexParser.CARET_SINGLE_CHAR_NUMBER);
 				}
 				break;
 			default:
 				throw new NoViableAltException(this);
 			}
-			this.state = 337;
+			this.state = 358;
 			this.match(LatexParser.R_BRACE);
-			this.state = 338;
+			this.state = 359;
 			this.match(LatexParser.L_BRACE);
-			this.state = 345;
+			this.state = 366;
 			this._errHandler.sync(this);
 			switch (this._input.LA(1)) {
-			case 17:
+			case 19:
 				{
-				this.state = 339;
+				this.state = 360;
 				localctx._MATHRM_1 = this.match(LatexParser.CMD_MATHRM);
-				this.state = 340;
+				this.state = 361;
 				this.match(LatexParser.L_BRACE);
-				this.state = 341;
+				this.state = 362;
 				this.id();
-				this.state = 342;
+				this.state = 363;
 				this.match(LatexParser.R_BRACE);
 				}
 				break;
-			case 71:
+			case 73:
 				{
-				this.state = 344;
+				this.state = 365;
 				this.id();
 				}
 				break;
 			default:
 				throw new NoViableAltException(this);
 			}
-			this.state = 347;
+			this.state = 368;
 			this.match(LatexParser.L_PAREN);
-			this.state = 348;
+			this.state = 369;
 			this.id();
-			this.state = 349;
+			this.state = 370;
 			this.match(LatexParser.R_PAREN);
-			this.state = 356;
+			this.state = 377;
 			this._errHandler.sync(this);
 			switch (this._input.LA(1)) {
-			case 54:
+			case 56:
 				{
 				{
-				this.state = 350;
+				this.state = 371;
 				this.match(LatexParser.CARET);
-				this.state = 351;
+				this.state = 372;
 				this.match(LatexParser.L_BRACE);
-				this.state = 352;
+				this.state = 373;
 				this.number_();
-				this.state = 353;
+				this.state = 374;
 				this.match(LatexParser.R_BRACE);
 				}
 				}
 				break;
-			case 62:
+			case 64:
 				{
-				this.state = 355;
+				this.state = 376;
 				localctx._single_char_exp2 = this.match(LatexParser.CARET_SINGLE_CHAR_NUMBER);
 				}
 				break;
 			default:
 				throw new NoViableAltException(this);
 			}
-			this.state = 358;
+			this.state = 379;
 			this.match(LatexParser.R_BRACE);
-			this.state = 359;
+			this.state = 380;
 			this.match(LatexParser.L_PAREN);
-			this.state = 360;
+			this.state = 381;
 			this.expr(0);
-			this.state = 361;
+			this.state = 382;
 			this.match(LatexParser.R_PAREN);
 			}
 		}
@@ -1631,21 +1716,21 @@ export default class LatexParser extends Parser {
 	// @RuleVersion(0)
 	public argument(): ArgumentContext {
 		let localctx: ArgumentContext = new ArgumentContext(this, this._ctx, this.state);
-		this.enterRule(localctx, 38, LatexParser.RULE_argument);
+		this.enterRule(localctx, 40, LatexParser.RULE_argument);
 		let _la: number;
 		try {
-			this.state = 373;
+			this.state = 394;
 			this._errHandler.sync(this);
-			switch ( this._interp.adaptivePredict(this._input, 29, this._ctx) ) {
+			switch ( this._interp.adaptivePredict(this._input, 30, this._ctx) ) {
 			case 1:
 				this.enterOuterAlt(localctx, 1);
 				{
 				{
-				this.state = 363;
+				this.state = 384;
 				this.id();
-				this.state = 364;
+				this.state = 385;
 				this.match(LatexParser.EQ);
-				this.state = 365;
+				this.state = 386;
 				this.expr(0);
 				}
 				}
@@ -1654,31 +1739,31 @@ export default class LatexParser extends Parser {
 				this.enterOuterAlt(localctx, 2);
 				{
 				{
-				this.state = 367;
+				this.state = 388;
 				this.expr(0);
-				this.state = 368;
+				this.state = 389;
 				localctx._lower = this._input.LT(1);
 				_la = this._input.LA(1);
-				if(!(_la===56 || _la===58)) {
+				if(!(_la===58 || _la===60)) {
 				    localctx._lower = this._errHandler.recoverInline(this);
 				}
 				else {
 					this._errHandler.reportMatch(this);
 				    this.consume();
 				}
-				this.state = 369;
+				this.state = 390;
 				this.id();
-				this.state = 370;
+				this.state = 391;
 				localctx._upper = this._input.LT(1);
 				_la = this._input.LA(1);
-				if(!(_la===56 || _la===58)) {
+				if(!(_la===58 || _la===60)) {
 				    localctx._upper = this._errHandler.recoverInline(this);
 				}
 				else {
 					this._errHandler.reportMatch(this);
 				    this.consume();
 				}
-				this.state = 371;
+				this.state = 392;
 				this.expr(0);
 				}
 				}
@@ -1702,22 +1787,22 @@ export default class LatexParser extends Parser {
 	// @RuleVersion(0)
 	public condition(): ConditionContext {
 		let localctx: ConditionContext = new ConditionContext(this, this._ctx, this.state);
-		this.enterRule(localctx, 40, LatexParser.RULE_condition);
+		this.enterRule(localctx, 42, LatexParser.RULE_condition);
 		try {
-			this.state = 377;
+			this.state = 398;
 			this._errHandler.sync(this);
-			switch ( this._interp.adaptivePredict(this._input, 30, this._ctx) ) {
+			switch ( this._interp.adaptivePredict(this._input, 31, this._ctx) ) {
 			case 1:
 				this.enterOuterAlt(localctx, 1);
 				{
-				this.state = 375;
+				this.state = 396;
 				this.condition_single();
 				}
 				break;
 			case 2:
 				this.enterOuterAlt(localctx, 2);
 				{
-				this.state = 376;
+				this.state = 397;
 				this.condition_chain();
 				}
 				break;
@@ -1740,29 +1825,29 @@ export default class LatexParser extends Parser {
 	// @RuleVersion(0)
 	public id_list(): Id_listContext {
 		let localctx: Id_listContext = new Id_listContext(this, this._ctx, this.state);
-		this.enterRule(localctx, 42, LatexParser.RULE_id_list);
+		this.enterRule(localctx, 44, LatexParser.RULE_id_list);
 		let _la: number;
 		try {
 			this.enterOuterAlt(localctx, 1);
 			{
-			this.state = 379;
+			this.state = 400;
 			this.id();
-			this.state = 382;
+			this.state = 403;
 			this._errHandler.sync(this);
 			_la = this._input.LA(1);
 			do {
 				{
 				{
-				this.state = 380;
+				this.state = 401;
 				this.match(LatexParser.COMMA);
-				this.state = 381;
+				this.state = 402;
 				this.id();
 				}
 				}
-				this.state = 384;
+				this.state = 405;
 				this._errHandler.sync(this);
 				_la = this._input.LA(1);
-			} while (_la===60);
+			} while (_la===62);
 			}
 		}
 		catch (re) {
@@ -1782,34 +1867,34 @@ export default class LatexParser extends Parser {
 	// @RuleVersion(0)
 	public guess(): GuessContext {
 		let localctx: GuessContext = new GuessContext(this, this._ctx, this.state);
-		this.enterRule(localctx, 44, LatexParser.RULE_guess);
+		this.enterRule(localctx, 46, LatexParser.RULE_guess);
 		let _la: number;
 		try {
 			this.enterOuterAlt(localctx, 1);
 			{
-			this.state = 386;
+			this.state = 407;
 			this.id();
-			this.state = 387;
+			this.state = 408;
 			_la = this._input.LA(1);
-			if(!(_la===24 || _la===25)) {
+			if(!(_la===26 || _la===27)) {
 			this._errHandler.recoverInline(this);
 			}
 			else {
 				this._errHandler.reportMatch(this);
 			    this.consume();
 			}
-			this.state = 390;
+			this.state = 411;
 			this._errHandler.sync(this);
-			switch ( this._interp.adaptivePredict(this._input, 32, this._ctx) ) {
+			switch ( this._interp.adaptivePredict(this._input, 33, this._ctx) ) {
 			case 1:
 				{
-				this.state = 388;
+				this.state = 409;
 				this.number_();
 				}
 				break;
 			case 2:
 				{
-				this.state = 389;
+				this.state = 410;
 				this.number_with_units();
 				}
 				break;
@@ -1833,29 +1918,29 @@ export default class LatexParser extends Parser {
 	// @RuleVersion(0)
 	public guess_list(): Guess_listContext {
 		let localctx: Guess_listContext = new Guess_listContext(this, this._ctx, this.state);
-		this.enterRule(localctx, 46, LatexParser.RULE_guess_list);
+		this.enterRule(localctx, 48, LatexParser.RULE_guess_list);
 		let _la: number;
 		try {
 			this.enterOuterAlt(localctx, 1);
 			{
-			this.state = 392;
+			this.state = 413;
 			this.guess();
-			this.state = 395;
+			this.state = 416;
 			this._errHandler.sync(this);
 			_la = this._input.LA(1);
 			do {
 				{
 				{
-				this.state = 393;
+				this.state = 414;
 				this.match(LatexParser.COMMA);
-				this.state = 394;
+				this.state = 415;
 				this.guess();
 				}
 				}
-				this.state = 397;
+				this.state = 418;
 				this._errHandler.sync(this);
 				_la = this._input.LA(1);
-			} while (_la===60);
+			} while (_la===62);
 			}
 		}
 		catch (re) {
@@ -1875,24 +1960,24 @@ export default class LatexParser extends Parser {
 	// @RuleVersion(0)
 	public condition_single(): Condition_singleContext {
 		let localctx: Condition_singleContext = new Condition_singleContext(this, this._ctx, this.state);
-		this.enterRule(localctx, 48, LatexParser.RULE_condition_single);
+		this.enterRule(localctx, 50, LatexParser.RULE_condition_single);
 		let _la: number;
 		try {
 			this.enterOuterAlt(localctx, 1);
 			{
-			this.state = 399;
+			this.state = 420;
 			this.expr(0);
-			this.state = 400;
+			this.state = 421;
 			localctx._operator = this._input.LT(1);
 			_la = this._input.LA(1);
-			if(!(((((_la - 56)) & ~0x1F) === 0 && ((1 << (_la - 56)) & 15) !== 0))) {
+			if(!(((((_la - 58)) & ~0x1F) === 0 && ((1 << (_la - 58)) & 15) !== 0))) {
 			    localctx._operator = this._errHandler.recoverInline(this);
 			}
 			else {
 				this._errHandler.reportMatch(this);
 			    this.consume();
 			}
-			this.state = 401;
+			this.state = 422;
 			this.expr(0);
 			}
 		}
@@ -1913,36 +1998,36 @@ export default class LatexParser extends Parser {
 	// @RuleVersion(0)
 	public condition_chain(): Condition_chainContext {
 		let localctx: Condition_chainContext = new Condition_chainContext(this, this._ctx, this.state);
-		this.enterRule(localctx, 50, LatexParser.RULE_condition_chain);
+		this.enterRule(localctx, 52, LatexParser.RULE_condition_chain);
 		let _la: number;
 		try {
 			this.enterOuterAlt(localctx, 1);
 			{
-			this.state = 403;
+			this.state = 424;
 			this.expr(0);
-			this.state = 404;
+			this.state = 425;
 			localctx._lower = this._input.LT(1);
 			_la = this._input.LA(1);
-			if(!(((((_la - 56)) & ~0x1F) === 0 && ((1 << (_la - 56)) & 15) !== 0))) {
+			if(!(((((_la - 58)) & ~0x1F) === 0 && ((1 << (_la - 58)) & 15) !== 0))) {
 			    localctx._lower = this._errHandler.recoverInline(this);
 			}
 			else {
 				this._errHandler.reportMatch(this);
 			    this.consume();
 			}
-			this.state = 405;
+			this.state = 426;
 			this.expr(0);
-			this.state = 406;
+			this.state = 427;
 			localctx._upper = this._input.LT(1);
 			_la = this._input.LA(1);
-			if(!(((((_la - 56)) & ~0x1F) === 0 && ((1 << (_la - 56)) & 15) !== 0))) {
+			if(!(((((_la - 58)) & ~0x1F) === 0 && ((1 << (_la - 58)) & 15) !== 0))) {
 			    localctx._upper = this._errHandler.recoverInline(this);
 			}
 			else {
 				this._errHandler.reportMatch(this);
 			    this.consume();
 			}
-			this.state = 407;
+			this.state = 428;
 			this.expr(0);
 			}
 		}
@@ -1963,26 +2048,26 @@ export default class LatexParser extends Parser {
 	// @RuleVersion(0)
 	public matrix_row(): Matrix_rowContext {
 		let localctx: Matrix_rowContext = new Matrix_rowContext(this, this._ctx, this.state);
-		this.enterRule(localctx, 52, LatexParser.RULE_matrix_row);
+		this.enterRule(localctx, 54, LatexParser.RULE_matrix_row);
 		let _la: number;
 		try {
 			this.enterOuterAlt(localctx, 1);
 			{
-			this.state = 409;
+			this.state = 430;
 			this.expr(0);
-			this.state = 414;
+			this.state = 435;
 			this._errHandler.sync(this);
 			_la = this._input.LA(1);
-			while (_la===67) {
+			while (_la===69) {
 				{
 				{
-				this.state = 410;
+				this.state = 431;
 				this.match(LatexParser.AMPERSAND);
-				this.state = 411;
+				this.state = 432;
 				this.expr(0);
 				}
 				}
-				this.state = 416;
+				this.state = 437;
 				this._errHandler.sync(this);
 				_la = this._input.LA(1);
 			}
@@ -2005,47 +2090,47 @@ export default class LatexParser extends Parser {
 	// @RuleVersion(0)
 	public user_function(): User_functionContext {
 		let localctx: User_functionContext = new User_functionContext(this, this._ctx, this.state);
-		this.enterRule(localctx, 54, LatexParser.RULE_user_function);
+		this.enterRule(localctx, 56, LatexParser.RULE_user_function);
 		let _la: number;
 		try {
 			this.enterOuterAlt(localctx, 1);
 			{
-			this.state = 417;
+			this.state = 438;
 			this.id();
-			this.state = 418;
+			this.state = 439;
 			this.match(LatexParser.L_PAREN);
 			{
-			this.state = 419;
+			this.state = 440;
 			this.argument();
-			this.state = 424;
+			this.state = 445;
 			this._errHandler.sync(this);
 			_la = this._input.LA(1);
-			while (_la===60) {
+			while (_la===62) {
 				{
 				{
-				this.state = 420;
+				this.state = 441;
 				this.match(LatexParser.COMMA);
-				this.state = 421;
+				this.state = 442;
 				this.argument();
 				}
 				}
-				this.state = 426;
+				this.state = 447;
 				this._errHandler.sync(this);
 				_la = this._input.LA(1);
 			}
 			}
-			this.state = 427;
+			this.state = 448;
 			this.match(LatexParser.R_PAREN);
-			this.state = 432;
+			this.state = 453;
 			this._errHandler.sync(this);
-			switch ( this._interp.adaptivePredict(this._input, 36, this._ctx) ) {
+			switch ( this._interp.adaptivePredict(this._input, 37, this._ctx) ) {
 			case 1:
 				{
-				this.state = 428;
+				this.state = 449;
 				localctx._points_id_0 = this.match(LatexParser.ID);
-				this.state = 429;
+				this.state = 450;
 				localctx._num_points = this.number_();
-				this.state = 430;
+				this.state = 451;
 				localctx._points_id_1 = this.match(LatexParser.ID);
 				}
 				break;
@@ -2069,58 +2154,58 @@ export default class LatexParser extends Parser {
 	// @RuleVersion(0)
 	public builtin_function(): Builtin_functionContext {
 		let localctx: Builtin_functionContext = new Builtin_functionContext(this, this._ctx, this.state);
-		this.enterRule(localctx, 56, LatexParser.RULE_builtin_function);
+		this.enterRule(localctx, 58, LatexParser.RULE_builtin_function);
 		let _la: number;
 		try {
 			this.enterOuterAlt(localctx, 1);
 			{
-			this.state = 440;
+			this.state = 461;
 			this._errHandler.sync(this);
 			switch (this._input.LA(1)) {
-			case 17:
+			case 19:
 				{
-				this.state = 434;
+				this.state = 455;
 				this.match(LatexParser.CMD_MATHRM);
-				this.state = 435;
+				this.state = 456;
 				this.match(LatexParser.L_BRACE);
-				this.state = 436;
+				this.state = 457;
 				this.id();
-				this.state = 437;
+				this.state = 458;
 				this.match(LatexParser.R_BRACE);
 				}
 				break;
-			case 71:
+			case 73:
 				{
-				this.state = 439;
+				this.state = 460;
 				this.id();
 				}
 				break;
 			default:
 				throw new NoViableAltException(this);
 			}
-			this.state = 442;
+			this.state = 463;
 			this.match(LatexParser.L_PAREN);
 			{
-			this.state = 443;
+			this.state = 464;
 			this.expr(0);
-			this.state = 448;
+			this.state = 469;
 			this._errHandler.sync(this);
 			_la = this._input.LA(1);
-			while (_la===60) {
+			while (_la===62) {
 				{
 				{
-				this.state = 444;
+				this.state = 465;
 				this.match(LatexParser.COMMA);
-				this.state = 445;
+				this.state = 466;
 				this.expr(0);
 				}
 				}
-				this.state = 450;
+				this.state = 471;
 				this._errHandler.sync(this);
 				_la = this._input.LA(1);
 			}
 			}
-			this.state = 451;
+			this.state = 472;
 			this.match(LatexParser.R_PAREN);
 			}
 		}
@@ -2151,25 +2236,25 @@ export default class LatexParser extends Parser {
 		let _parentState: number = this.state;
 		let localctx: ExprContext = new ExprContext(this, this._ctx, _parentState);
 		let _prevctx: ExprContext = localctx;
-		let _startState: number = 58;
-		this.enterRecursionRule(localctx, 58, LatexParser.RULE_expr, _p);
+		let _startState: number = 60;
+		this.enterRecursionRule(localctx, 60, LatexParser.RULE_expr, _p);
 		let _la: number;
 		try {
 			let _alt: number;
 			this.enterOuterAlt(localctx, 1);
 			{
-			this.state = 582;
+			this.state = 605;
 			this._errHandler.sync(this);
-			switch ( this._interp.adaptivePredict(this._input, 46, this._ctx) ) {
+			switch ( this._interp.adaptivePredict(this._input, 47, this._ctx) ) {
 			case 1:
 				{
 				localctx = new ExponentContext(this, localctx);
 				this._ctx = localctx;
 				_prevctx = localctx;
 
-				this.state = 454;
+				this.state = 475;
 				this.id();
-				this.state = 455;
+				this.state = 476;
 				this.match(LatexParser.CARET_SINGLE_CHAR_ID_UNDERSCORE_SUBSCRIPT);
 				}
 				break;
@@ -2178,18 +2263,18 @@ export default class LatexParser extends Parser {
 				localctx = new ExponentContext(this, localctx);
 				this._ctx = localctx;
 				_prevctx = localctx;
-				this.state = 457;
+				this.state = 478;
 				this.id();
-				this.state = 458;
+				this.state = 479;
 				_la = this._input.LA(1);
-				if(!(_la===62 || _la===63)) {
+				if(!(_la===64 || _la===65)) {
 				this._errHandler.recoverInline(this);
 				}
 				else {
 					this._errHandler.reportMatch(this);
 				    this.consume();
 				}
-				this.state = 459;
+				this.state = 480;
 				this.match(LatexParser.UNDERSCORE_SUBSCRIPT);
 				}
 				break;
@@ -2198,17 +2283,17 @@ export default class LatexParser extends Parser {
 				localctx = new ExponentContext(this, localctx);
 				this._ctx = localctx;
 				_prevctx = localctx;
-				this.state = 461;
+				this.state = 482;
 				this.id();
-				this.state = 462;
+				this.state = 483;
 				this.match(LatexParser.CARET);
-				this.state = 463;
+				this.state = 484;
 				this.match(LatexParser.L_BRACE);
-				this.state = 464;
+				this.state = 485;
 				this.expr(0);
-				this.state = 465;
+				this.state = 486;
 				this.match(LatexParser.R_BRACE);
-				this.state = 466;
+				this.state = 487;
 				this.match(LatexParser.UNDERSCORE_SUBSCRIPT);
 				}
 				break;
@@ -2217,7 +2302,7 @@ export default class LatexParser extends Parser {
 				localctx = new SingleIntSqrtContext(this, localctx);
 				this._ctx = localctx;
 				_prevctx = localctx;
-				this.state = 468;
+				this.state = 489;
 				this.match(LatexParser.CMD_SQRT_INT);
 				}
 				break;
@@ -2226,13 +2311,13 @@ export default class LatexParser extends Parser {
 				localctx = new SqrtContext(this, localctx);
 				this._ctx = localctx;
 				_prevctx = localctx;
-				this.state = 469;
+				this.state = 490;
 				this.match(LatexParser.CMD_SQRT);
-				this.state = 470;
+				this.state = 491;
 				this.match(LatexParser.L_BRACE);
-				this.state = 471;
+				this.state = 492;
 				this.expr(0);
-				this.state = 472;
+				this.state = 493;
 				this.match(LatexParser.R_BRACE);
 				}
 				break;
@@ -2241,27 +2326,27 @@ export default class LatexParser extends Parser {
 				localctx = new MatrixContext(this, localctx);
 				this._ctx = localctx;
 				_prevctx = localctx;
-				this.state = 474;
+				this.state = 495;
 				this.match(LatexParser.BEGIN_MATRIX);
-				this.state = 475;
+				this.state = 496;
 				this.matrix_row();
-				this.state = 480;
+				this.state = 501;
 				this._errHandler.sync(this);
 				_la = this._input.LA(1);
-				while (_la===68) {
+				while (_la===70) {
 					{
 					{
-					this.state = 476;
+					this.state = 497;
 					this.match(LatexParser.DOUBLE_BACKSLASH);
-					this.state = 477;
+					this.state = 498;
 					this.matrix_row();
 					}
 					}
-					this.state = 482;
+					this.state = 503;
 					this._errHandler.sync(this);
 					_la = this._input.LA(1);
 				}
-				this.state = 483;
+				this.state = 504;
 				this.match(LatexParser.END_MATRIX);
 				}
 				break;
@@ -2270,7 +2355,7 @@ export default class LatexParser extends Parser {
 				localctx = new TrigFunctionContext(this, localctx);
 				this._ctx = localctx;
 				_prevctx = localctx;
-				this.state = 485;
+				this.state = 506;
 				this.trig_function();
 				}
 				break;
@@ -2279,7 +2364,7 @@ export default class LatexParser extends Parser {
 				localctx = new IndefiniteIntegralContext(this, localctx);
 				this._ctx = localctx;
 				_prevctx = localctx;
-				this.state = 486;
+				this.state = 507;
 				this.indefinite_integral_cmd();
 				}
 				break;
@@ -2288,7 +2373,7 @@ export default class LatexParser extends Parser {
 				localctx = new IntegralContext(this, localctx);
 				this._ctx = localctx;
 				_prevctx = localctx;
-				this.state = 487;
+				this.state = 508;
 				this.integral_cmd();
 				}
 				break;
@@ -2297,7 +2382,7 @@ export default class LatexParser extends Parser {
 				localctx = new DerivativeContext(this, localctx);
 				this._ctx = localctx;
 				_prevctx = localctx;
-				this.state = 488;
+				this.state = 509;
 				this.derivative_cmd();
 				}
 				break;
@@ -2306,365 +2391,383 @@ export default class LatexParser extends Parser {
 				localctx = new NDerivativeContext(this, localctx);
 				this._ctx = localctx;
 				_prevctx = localctx;
-				this.state = 489;
+				this.state = 510;
 				this.n_derivative_cmd();
 				}
 				break;
 			case 12:
+				{
+				localctx = new SummationContext(this, localctx);
+				this._ctx = localctx;
+				_prevctx = localctx;
+				this.state = 511;
+				this.summation_cmd();
+				}
+				break;
+			case 13:
 				{
 				localctx = new LnContext(this, localctx);
 				this._ctx = localctx;
 				_prevctx = localctx;
-				this.state = 491;
+				this.state = 513;
 				this._errHandler.sync(this);
 				_la = this._input.LA(1);
-				if (_la===28) {
+				if (_la===30) {
 					{
-					this.state = 490;
+					this.state = 512;
 					this.match(LatexParser.BACKSLASH);
 					}
 				}
 
-				this.state = 493;
+				this.state = 515;
 				this.match(LatexParser.CMD_LN);
-				this.state = 494;
+				this.state = 516;
 				this.match(LatexParser.L_PAREN);
-				this.state = 495;
+				this.state = 517;
 				this.expr(0);
-				this.state = 496;
+				this.state = 518;
 				this.match(LatexParser.R_PAREN);
 				}
 				break;
-			case 13:
+			case 14:
 				{
 				localctx = new LogContext(this, localctx);
 				this._ctx = localctx;
 				_prevctx = localctx;
-				this.state = 499;
+				this.state = 521;
 				this._errHandler.sync(this);
 				_la = this._input.LA(1);
-				if (_la===28) {
+				if (_la===30) {
 					{
-					this.state = 498;
+					this.state = 520;
 					this.match(LatexParser.BACKSLASH);
 					}
 				}
 
-				this.state = 501;
+				this.state = 523;
 				this.match(LatexParser.CMD_LOG);
-				this.state = 502;
+				this.state = 524;
 				this.match(LatexParser.L_PAREN);
-				this.state = 503;
+				this.state = 525;
 				this.expr(0);
-				this.state = 504;
+				this.state = 526;
 				this.match(LatexParser.R_PAREN);
 				}
 				break;
-			case 14:
+			case 15:
 				{
 				localctx = new BaseLogContext(this, localctx);
 				this._ctx = localctx;
 				_prevctx = localctx;
-				this.state = 506;
+				this.state = 528;
 				this.match(LatexParser.CMD_SLASH_LOG_UNDERSCORE);
-				this.state = 507;
+				this.state = 529;
 				this.match(LatexParser.L_BRACE);
-				this.state = 508;
+				this.state = 530;
 				this.expr(0);
-				this.state = 509;
+				this.state = 531;
 				this.match(LatexParser.R_BRACE);
-				this.state = 510;
+				this.state = 532;
 				this.match(LatexParser.L_PAREN);
-				this.state = 511;
+				this.state = 533;
 				this.expr(0);
-				this.state = 512;
+				this.state = 534;
 				this.match(LatexParser.R_PAREN);
 				}
 				break;
-			case 15:
+			case 16:
 				{
 				localctx = new BaseLogSingleCharContext(this, localctx);
 				this._ctx = localctx;
 				_prevctx = localctx;
-				this.state = 514;
+				this.state = 536;
 				_la = this._input.LA(1);
-				if(!(_la===46 || _la===47)) {
+				if(!(_la===48 || _la===49)) {
 				this._errHandler.recoverInline(this);
 				}
 				else {
 					this._errHandler.reportMatch(this);
 				    this.consume();
 				}
-				this.state = 515;
+				this.state = 537;
 				this.match(LatexParser.L_PAREN);
-				this.state = 516;
+				this.state = 538;
 				this.expr(0);
-				this.state = 517;
+				this.state = 539;
 				this.match(LatexParser.R_PAREN);
 				}
 				break;
-			case 16:
+			case 17:
 				{
 				localctx = new NormContext(this, localctx);
 				this._ctx = localctx;
 				_prevctx = localctx;
-				this.state = 519;
+				this.state = 541;
 				this.match(LatexParser.DOUBLE_VBAR);
-				this.state = 520;
+				this.state = 542;
 				this.expr(0);
-				this.state = 521;
+				this.state = 543;
 				this.match(LatexParser.DOUBLE_VBAR);
 				}
 				break;
-			case 17:
+			case 18:
 				{
 				localctx = new AbsContext(this, localctx);
 				this._ctx = localctx;
 				_prevctx = localctx;
-				this.state = 523;
+				this.state = 545;
 				this.match(LatexParser.VBAR);
-				this.state = 524;
+				this.state = 546;
 				this.expr(0);
-				this.state = 525;
+				this.state = 547;
 				this.match(LatexParser.VBAR);
 				}
 				break;
-			case 18:
+			case 19:
 				{
 				localctx = new NumberWithUnitsExprContext(this, localctx);
 				this._ctx = localctx;
 				_prevctx = localctx;
-				this.state = 527;
+				this.state = 549;
 				this.number_with_units();
 				}
 				break;
-			case 19:
+			case 20:
 				{
 				localctx = new NumberExprContext(this, localctx);
 				this._ctx = localctx;
 				_prevctx = localctx;
-				this.state = 528;
+				this.state = 550;
 				this.number_();
 				}
 				break;
-			case 20:
+			case 21:
 				{
 				localctx = new UnaryMinusContext(this, localctx);
 				this._ctx = localctx;
 				_prevctx = localctx;
-				this.state = 529;
+				this.state = 551;
 				this.match(LatexParser.SUB);
-				this.state = 530;
-				this.expr(30);
+				this.state = 552;
+				this.expr(31);
 				}
 				break;
-			case 21:
+			case 22:
 				{
 				localctx = new DivideContext(this, localctx);
 				this._ctx = localctx;
 				_prevctx = localctx;
-				this.state = 531;
+				this.state = 553;
 				this.match(LatexParser.CMD_FRAC);
-				this.state = 532;
+				this.state = 554;
 				this.match(LatexParser.L_BRACE);
-				this.state = 533;
+				this.state = 555;
 				this.expr(0);
-				this.state = 534;
+				this.state = 556;
 				this.match(LatexParser.R_BRACE);
-				this.state = 535;
+				this.state = 557;
 				this.match(LatexParser.L_BRACE);
-				this.state = 536;
+				this.state = 558;
 				this.expr(0);
-				this.state = 537;
+				this.state = 559;
 				this.match(LatexParser.R_BRACE);
 				}
 				break;
-			case 22:
+			case 23:
 				{
 				localctx = new DivideIntsContext(this, localctx);
 				this._ctx = localctx;
 				_prevctx = localctx;
-				this.state = 539;
+				this.state = 561;
 				this.match(LatexParser.CMD_FRAC_INTS);
 				}
 				break;
-			case 23:
+			case 24:
 				{
 				localctx = new VariableContext(this, localctx);
 				this._ctx = localctx;
 				_prevctx = localctx;
-				this.state = 540;
+				this.state = 562;
 				this.id();
 				}
 				break;
-			case 24:
+			case 25:
 				{
 				localctx = new UserFunctionContext(this, localctx);
 				this._ctx = localctx;
 				_prevctx = localctx;
-				this.state = 541;
+				this.state = 563;
 				this.user_function();
 				}
 				break;
-			case 25:
+			case 26:
 				{
 				localctx = new BuiltinFunctionContext(this, localctx);
 				this._ctx = localctx;
 				_prevctx = localctx;
-				this.state = 542;
+				this.state = 564;
 				this.builtin_function();
 				}
 				break;
-			case 26:
+			case 27:
 				{
 				localctx = new PiExprContext(this, localctx);
 				this._ctx = localctx;
 				_prevctx = localctx;
-				this.state = 543;
+				this.state = 565;
 				this.match(LatexParser.PI);
 				}
 				break;
-			case 27:
+			case 28:
+				{
+				localctx = new InfinityExprContext(this, localctx);
+				this._ctx = localctx;
+				_prevctx = localctx;
+				this.state = 566;
+				this.match(LatexParser.INFINITY);
+				}
+				break;
+			case 29:
 				{
 				localctx = new SubExprContext(this, localctx);
 				this._ctx = localctx;
 				_prevctx = localctx;
-				this.state = 544;
+				this.state = 567;
 				this.match(LatexParser.L_PAREN);
-				this.state = 545;
+				this.state = 568;
 				this.expr(0);
-				this.state = 546;
+				this.state = 569;
 				this.match(LatexParser.R_PAREN);
 				}
 				break;
-			case 28:
+			case 30:
 				{
 				localctx = new MissingMultiplicationContext(this, localctx);
 				this._ctx = localctx;
 				_prevctx = localctx;
-				this.state = 548;
+				this.state = 571;
 				this.number_();
-				this.state = 549;
+				this.state = 572;
 				this.expr(12);
 				}
 				break;
-			case 29:
+			case 31:
 				{
 				localctx = new MissingMultiplicationContext(this, localctx);
 				this._ctx = localctx;
 				_prevctx = localctx;
-				this.state = 551;
+				this.state = 574;
 				this.number_with_units();
-				this.state = 552;
+				this.state = 575;
 				this.expr(11);
 				}
 				break;
-			case 30:
+			case 32:
 				{
 				localctx = new MissingMultiplicationContext(this, localctx);
 				this._ctx = localctx;
 				_prevctx = localctx;
-				this.state = 554;
+				this.state = 577;
 				this.match(LatexParser.PI);
-				this.state = 555;
+				this.state = 578;
 				this.expr(10);
 				}
 				break;
-			case 31:
+			case 33:
 				{
 				localctx = new EmptyPlaceholderContext(this, localctx);
 				this._ctx = localctx;
 				_prevctx = localctx;
-				this.state = 556;
+				this.state = 579;
 				this.match(LatexParser.CMD_PLACEHOLDER);
-				this.state = 559;
+				this.state = 582;
 				this._errHandler.sync(this);
-				switch ( this._interp.adaptivePredict(this._input, 42, this._ctx) ) {
+				switch ( this._interp.adaptivePredict(this._input, 43, this._ctx) ) {
 				case 1:
 					{
-					this.state = 557;
+					this.state = 580;
 					this.match(LatexParser.L_BRACE);
-					this.state = 558;
+					this.state = 581;
 					this.match(LatexParser.R_BRACE);
 					}
 					break;
 				}
 				}
 				break;
-			case 32:
+			case 34:
 				{
 				localctx = new RemoveOperatorFontContext(this, localctx);
 				this._ctx = localctx;
 				_prevctx = localctx;
-				this.state = 566;
+				this.state = 589;
 				this._errHandler.sync(this);
-				switch ( this._interp.adaptivePredict(this._input, 43, this._ctx) ) {
+				switch ( this._interp.adaptivePredict(this._input, 44, this._ctx) ) {
 				case 1:
 					{
-					this.state = 561;
+					this.state = 584;
 					this.match(LatexParser.CMD_MATHRM);
-					this.state = 562;
+					this.state = 585;
 					this.match(LatexParser.L_BRACE);
-					this.state = 563;
+					this.state = 586;
 					this.expr(0);
-					this.state = 564;
+					this.state = 587;
 					this.match(LatexParser.R_BRACE);
 					}
 					break;
 				}
-				this.state = 571;
+				this.state = 594;
 				this._errHandler.sync(this);
 				switch (this._input.LA(1)) {
-				case 61:
+				case 63:
 					{
-					this.state = 568;
+					this.state = 591;
 					this.match(LatexParser.DECIMAL_POINT);
 					}
 					break;
-				case 53:
-				case 64:
+				case 55:
+				case 66:
 					{
-					this.state = 569;
+					this.state = 592;
 					this.number_();
 					}
 					break;
-				case 55:
+				case 57:
 					{
-					this.state = 570;
+					this.state = 593;
 					this.match(LatexParser.EQ);
 					}
 					break;
-				case 17:
+				case 19:
 					break;
 				default:
 					break;
 				}
-				this.state = 573;
+				this.state = 596;
 				this.match(LatexParser.CMD_MATHRM);
-				this.state = 574;
+				this.state = 597;
 				this.match(LatexParser.L_BRACE);
-				this.state = 575;
+				this.state = 598;
 				this.expr(0);
-				this.state = 576;
+				this.state = 599;
 				this.match(LatexParser.R_BRACE);
-				this.state = 580;
+				this.state = 603;
 				this._errHandler.sync(this);
-				switch ( this._interp.adaptivePredict(this._input, 45, this._ctx) ) {
+				switch ( this._interp.adaptivePredict(this._input, 46, this._ctx) ) {
 				case 1:
 					{
-					this.state = 577;
+					this.state = 600;
 					this.match(LatexParser.DECIMAL_POINT);
 					}
 					break;
 				case 2:
 					{
-					this.state = 578;
+					this.state = 601;
 					this.number_();
 					}
 					break;
 				case 3:
 					{
-					this.state = 579;
+					this.state = 602;
 					this.match(LatexParser.EQ);
 					}
 					break;
@@ -2673,9 +2776,9 @@ export default class LatexParser extends Parser {
 				break;
 			}
 			this._ctx.stop = this._input.LT(-1);
-			this.state = 648;
+			this.state = 671;
 			this._errHandler.sync(this);
-			_alt = this._interp.adaptivePredict(this._input, 48, this._ctx);
+			_alt = this._interp.adaptivePredict(this._input, 49, this._ctx);
 			while (_alt !== 2 && _alt !== ATN.INVALID_ALT_NUMBER) {
 				if (_alt === 1) {
 					if (this._parseListeners != null) {
@@ -2683,76 +2786,76 @@ export default class LatexParser extends Parser {
 					}
 					_prevctx = localctx;
 					{
-					this.state = 646;
+					this.state = 669;
 					this._errHandler.sync(this);
-					switch ( this._interp.adaptivePredict(this._input, 47, this._ctx) ) {
+					switch ( this._interp.adaptivePredict(this._input, 48, this._ctx) ) {
 					case 1:
 						{
 						localctx = new MatrixMultiplyContext(this, new ExprContext(this, _parentctx, _parentState));
 						this.pushNewRecursionContext(localctx, _startState, LatexParser.RULE_expr);
-						this.state = 584;
-						if (!(this.precpred(this._ctx, 29))) {
-							throw this.createFailedPredicateException("this.precpred(this._ctx, 29)");
+						this.state = 607;
+						if (!(this.precpred(this._ctx, 30))) {
+							throw this.createFailedPredicateException("this.precpred(this._ctx, 30)");
 						}
-						this.state = 585;
+						this.state = 608;
 						this.match(LatexParser.CMD_TIMES);
-						this.state = 586;
-						this.expr(30);
+						this.state = 609;
+						this.expr(31);
 						}
 						break;
 					case 2:
 						{
 						localctx = new MultiplyContext(this, new ExprContext(this, _parentctx, _parentState));
 						this.pushNewRecursionContext(localctx, _startState, LatexParser.RULE_expr);
-						this.state = 587;
-						if (!(this.precpred(this._ctx, 28))) {
-							throw this.createFailedPredicateException("this.precpred(this._ctx, 28)");
+						this.state = 610;
+						if (!(this.precpred(this._ctx, 29))) {
+							throw this.createFailedPredicateException("this.precpred(this._ctx, 29)");
 						}
-						this.state = 588;
+						this.state = 611;
 						this.match(LatexParser.CMD_CDOT);
-						this.state = 589;
-						this.expr(29);
+						this.state = 612;
+						this.expr(30);
 						}
 						break;
 					case 3:
 						{
 						localctx = new SubtractContext(this, new ExprContext(this, _parentctx, _parentState));
 						this.pushNewRecursionContext(localctx, _startState, LatexParser.RULE_expr);
-						this.state = 590;
-						if (!(this.precpred(this._ctx, 25))) {
-							throw this.createFailedPredicateException("this.precpred(this._ctx, 25)");
+						this.state = 613;
+						if (!(this.precpred(this._ctx, 26))) {
+							throw this.createFailedPredicateException("this.precpred(this._ctx, 26)");
 						}
-						this.state = 591;
+						this.state = 614;
 						this.match(LatexParser.SUB);
-						this.state = 592;
-						this.expr(26);
+						this.state = 615;
+						this.expr(27);
 						}
 						break;
 					case 4:
 						{
 						localctx = new AddContext(this, new ExprContext(this, _parentctx, _parentState));
 						this.pushNewRecursionContext(localctx, _startState, LatexParser.RULE_expr);
-						this.state = 593;
-						if (!(this.precpred(this._ctx, 24))) {
-							throw this.createFailedPredicateException("this.precpred(this._ctx, 24)");
+						this.state = 616;
+						if (!(this.precpred(this._ctx, 25))) {
+							throw this.createFailedPredicateException("this.precpred(this._ctx, 25)");
 						}
-						this.state = 594;
+						this.state = 617;
 						this.match(LatexParser.ADD);
-						this.state = 595;
-						this.expr(25);
+						this.state = 618;
+						this.expr(26);
 						}
 						break;
 					case 5:
 						{
 						localctx = new ExponentContext(this, new ExprContext(this, _parentctx, _parentState));
 						this.pushNewRecursionContext(localctx, _startState, LatexParser.RULE_expr);
-						this.state = 596;
-						if (!(this.precpred(this._ctx, 51))) {
-							throw this.createFailedPredicateException("this.precpred(this._ctx, 51)");
+						this.state = 619;
+						if (!(this.precpred(this._ctx, 53))) {
+							throw this.createFailedPredicateException("this.precpred(this._ctx, 53)");
 						}
-						this.state = 597;
+						this.state = 620;
 						_la = this._input.LA(1);
-						if(!(_la===62 || _la===63)) {
+						if(!(_la===64 || _la===65)) {
 						this._errHandler.recoverInline(this);
 						}
 						else {
@@ -2765,17 +2868,17 @@ export default class LatexParser extends Parser {
 						{
 						localctx = new ExponentContext(this, new ExprContext(this, _parentctx, _parentState));
 						this.pushNewRecursionContext(localctx, _startState, LatexParser.RULE_expr);
-						this.state = 598;
-						if (!(this.precpred(this._ctx, 50))) {
-							throw this.createFailedPredicateException("this.precpred(this._ctx, 50)");
+						this.state = 621;
+						if (!(this.precpred(this._ctx, 52))) {
+							throw this.createFailedPredicateException("this.precpred(this._ctx, 52)");
 						}
-						this.state = 599;
+						this.state = 622;
 						this.match(LatexParser.CARET);
-						this.state = 600;
+						this.state = 623;
 						this.match(LatexParser.L_BRACE);
-						this.state = 601;
+						this.state = 624;
 						this.expr(0);
-						this.state = 602;
+						this.state = 625;
 						this.match(LatexParser.R_BRACE);
 						}
 						break;
@@ -2783,21 +2886,21 @@ export default class LatexParser extends Parser {
 						{
 						localctx = new IndexContext(this, new ExprContext(this, _parentctx, _parentState));
 						this.pushNewRecursionContext(localctx, _startState, LatexParser.RULE_expr);
-						this.state = 604;
-						if (!(this.precpred(this._ctx, 49))) {
-							throw this.createFailedPredicateException("this.precpred(this._ctx, 49)");
+						this.state = 627;
+						if (!(this.precpred(this._ctx, 51))) {
+							throw this.createFailedPredicateException("this.precpred(this._ctx, 51)");
 						}
-						this.state = 605;
+						this.state = 628;
 						this.match(LatexParser.UNDERSCORE);
-						this.state = 606;
+						this.state = 629;
 						this.match(LatexParser.L_BRACE);
-						this.state = 607;
+						this.state = 630;
 						this.expr(0);
-						this.state = 608;
+						this.state = 631;
 						this.match(LatexParser.COMMA);
-						this.state = 609;
+						this.state = 632;
 						this.expr(0);
-						this.state = 610;
+						this.state = 633;
 						this.match(LatexParser.R_BRACE);
 						}
 						break;
@@ -2805,11 +2908,11 @@ export default class LatexParser extends Parser {
 						{
 						localctx = new TransposeContext(this, new ExprContext(this, _parentctx, _parentState));
 						this.pushNewRecursionContext(localctx, _startState, LatexParser.RULE_expr);
-						this.state = 612;
-						if (!(this.precpred(this._ctx, 48))) {
-							throw this.createFailedPredicateException("this.precpred(this._ctx, 48)");
+						this.state = 635;
+						if (!(this.precpred(this._ctx, 50))) {
+							throw this.createFailedPredicateException("this.precpred(this._ctx, 50)");
 						}
-						this.state = 613;
+						this.state = 636;
 						this.match(LatexParser.TRANSPOSE);
 						}
 						break;
@@ -2817,11 +2920,11 @@ export default class LatexParser extends Parser {
 						{
 						localctx = new FactorialContext(this, new ExprContext(this, _parentctx, _parentState));
 						this.pushNewRecursionContext(localctx, _startState, LatexParser.RULE_expr);
-						this.state = 614;
-						if (!(this.precpred(this._ctx, 47))) {
-							throw this.createFailedPredicateException("this.precpred(this._ctx, 47)");
+						this.state = 637;
+						if (!(this.precpred(this._ctx, 49))) {
+							throw this.createFailedPredicateException("this.precpred(this._ctx, 49)");
 						}
-						this.state = 615;
+						this.state = 638;
 						this.match(LatexParser.EXCLAMATION);
 						}
 						break;
@@ -2829,15 +2932,15 @@ export default class LatexParser extends Parser {
 						{
 						localctx = new EmptySubscriptContext(this, new ExprContext(this, _parentctx, _parentState));
 						this.pushNewRecursionContext(localctx, _startState, LatexParser.RULE_expr);
-						this.state = 616;
+						this.state = 639;
 						if (!(this.precpred(this._ctx, 18))) {
 							throw this.createFailedPredicateException("this.precpred(this._ctx, 18)");
 						}
-						this.state = 617;
+						this.state = 640;
 						this.match(LatexParser.UNDERSCORE);
-						this.state = 618;
+						this.state = 641;
 						this.match(LatexParser.L_BRACE);
-						this.state = 619;
+						this.state = 642;
 						this.match(LatexParser.R_BRACE);
 						}
 						break;
@@ -2845,15 +2948,15 @@ export default class LatexParser extends Parser {
 						{
 						localctx = new EmptySuperscriptContext(this, new ExprContext(this, _parentctx, _parentState));
 						this.pushNewRecursionContext(localctx, _startState, LatexParser.RULE_expr);
-						this.state = 620;
+						this.state = 643;
 						if (!(this.precpred(this._ctx, 17))) {
 							throw this.createFailedPredicateException("this.precpred(this._ctx, 17)");
 						}
-						this.state = 621;
+						this.state = 644;
 						this.match(LatexParser.CARET);
-						this.state = 622;
+						this.state = 645;
 						this.match(LatexParser.L_BRACE);
-						this.state = 623;
+						this.state = 646;
 						this.match(LatexParser.R_BRACE);
 						}
 						break;
@@ -2861,11 +2964,11 @@ export default class LatexParser extends Parser {
 						{
 						localctx = new MissingMultiplicationContext(this, new ExprContext(this, _parentctx, _parentState));
 						this.pushNewRecursionContext(localctx, _startState, LatexParser.RULE_expr);
-						this.state = 624;
+						this.state = 647;
 						if (!(this.precpred(this._ctx, 16))) {
 							throw this.createFailedPredicateException("this.precpred(this._ctx, 16)");
 						}
-						this.state = 625;
+						this.state = 648;
 						this.id();
 						}
 						break;
@@ -2873,11 +2976,11 @@ export default class LatexParser extends Parser {
 						{
 						localctx = new MissingMultiplicationContext(this, new ExprContext(this, _parentctx, _parentState));
 						this.pushNewRecursionContext(localctx, _startState, LatexParser.RULE_expr);
-						this.state = 626;
+						this.state = 649;
 						if (!(this.precpred(this._ctx, 15))) {
 							throw this.createFailedPredicateException("this.precpred(this._ctx, 15)");
 						}
-						this.state = 627;
+						this.state = 650;
 						this.number_();
 						}
 						break;
@@ -2885,11 +2988,11 @@ export default class LatexParser extends Parser {
 						{
 						localctx = new MissingMultiplicationContext(this, new ExprContext(this, _parentctx, _parentState));
 						this.pushNewRecursionContext(localctx, _startState, LatexParser.RULE_expr);
-						this.state = 628;
+						this.state = 651;
 						if (!(this.precpred(this._ctx, 14))) {
 							throw this.createFailedPredicateException("this.precpred(this._ctx, 14)");
 						}
-						this.state = 629;
+						this.state = 652;
 						this.number_with_units();
 						}
 						break;
@@ -2897,11 +3000,11 @@ export default class LatexParser extends Parser {
 						{
 						localctx = new MissingMultiplicationContext(this, new ExprContext(this, _parentctx, _parentState));
 						this.pushNewRecursionContext(localctx, _startState, LatexParser.RULE_expr);
-						this.state = 630;
+						this.state = 653;
 						if (!(this.precpred(this._ctx, 13))) {
 							throw this.createFailedPredicateException("this.precpred(this._ctx, 13)");
 						}
-						this.state = 631;
+						this.state = 654;
 						this.match(LatexParser.PI);
 						}
 						break;
@@ -2909,11 +3012,11 @@ export default class LatexParser extends Parser {
 						{
 						localctx = new MissingMultiplicationContext(this, new ExprContext(this, _parentctx, _parentState));
 						this.pushNewRecursionContext(localctx, _startState, LatexParser.RULE_expr);
-						this.state = 632;
+						this.state = 655;
 						if (!(this.precpred(this._ctx, 9))) {
 							throw this.createFailedPredicateException("this.precpred(this._ctx, 9)");
 						}
-						this.state = 633;
+						this.state = 656;
 						this.user_function();
 						}
 						break;
@@ -2921,11 +3024,11 @@ export default class LatexParser extends Parser {
 						{
 						localctx = new MissingMultiplicationContext(this, new ExprContext(this, _parentctx, _parentState));
 						this.pushNewRecursionContext(localctx, _startState, LatexParser.RULE_expr);
-						this.state = 634;
+						this.state = 657;
 						if (!(this.precpred(this._ctx, 8))) {
 							throw this.createFailedPredicateException("this.precpred(this._ctx, 8)");
 						}
-						this.state = 635;
+						this.state = 658;
 						this.builtin_function();
 						}
 						break;
@@ -2933,11 +3036,11 @@ export default class LatexParser extends Parser {
 						{
 						localctx = new MissingMultiplicationContext(this, new ExprContext(this, _parentctx, _parentState));
 						this.pushNewRecursionContext(localctx, _startState, LatexParser.RULE_expr);
-						this.state = 636;
+						this.state = 659;
 						if (!(this.precpred(this._ctx, 7))) {
 							throw this.createFailedPredicateException("this.precpred(this._ctx, 7)");
 						}
-						this.state = 637;
+						this.state = 660;
 						this.trig_function();
 						}
 						break;
@@ -2945,11 +3048,11 @@ export default class LatexParser extends Parser {
 						{
 						localctx = new MissingMultiplicationContext(this, new ExprContext(this, _parentctx, _parentState));
 						this.pushNewRecursionContext(localctx, _startState, LatexParser.RULE_expr);
-						this.state = 638;
+						this.state = 661;
 						if (!(this.precpred(this._ctx, 6))) {
 							throw this.createFailedPredicateException("this.precpred(this._ctx, 6)");
 						}
-						this.state = 639;
+						this.state = 662;
 						this.indefinite_integral_cmd();
 						}
 						break;
@@ -2957,11 +3060,11 @@ export default class LatexParser extends Parser {
 						{
 						localctx = new MissingMultiplicationContext(this, new ExprContext(this, _parentctx, _parentState));
 						this.pushNewRecursionContext(localctx, _startState, LatexParser.RULE_expr);
-						this.state = 640;
+						this.state = 663;
 						if (!(this.precpred(this._ctx, 5))) {
 							throw this.createFailedPredicateException("this.precpred(this._ctx, 5)");
 						}
-						this.state = 641;
+						this.state = 664;
 						this.integral_cmd();
 						}
 						break;
@@ -2969,11 +3072,11 @@ export default class LatexParser extends Parser {
 						{
 						localctx = new MissingMultiplicationContext(this, new ExprContext(this, _parentctx, _parentState));
 						this.pushNewRecursionContext(localctx, _startState, LatexParser.RULE_expr);
-						this.state = 642;
+						this.state = 665;
 						if (!(this.precpred(this._ctx, 4))) {
 							throw this.createFailedPredicateException("this.precpred(this._ctx, 4)");
 						}
-						this.state = 643;
+						this.state = 666;
 						this.derivative_cmd();
 						}
 						break;
@@ -2981,20 +3084,20 @@ export default class LatexParser extends Parser {
 						{
 						localctx = new MissingMultiplicationContext(this, new ExprContext(this, _parentctx, _parentState));
 						this.pushNewRecursionContext(localctx, _startState, LatexParser.RULE_expr);
-						this.state = 644;
+						this.state = 667;
 						if (!(this.precpred(this._ctx, 3))) {
 							throw this.createFailedPredicateException("this.precpred(this._ctx, 3)");
 						}
-						this.state = 645;
+						this.state = 668;
 						this.n_derivative_cmd();
 						}
 						break;
 					}
 					}
 				}
-				this.state = 650;
+				this.state = 673;
 				this._errHandler.sync(this);
-				_alt = this._interp.adaptivePredict(this._input, 48, this._ctx);
+				_alt = this._interp.adaptivePredict(this._input, 49, this._ctx);
 			}
 			}
 		}
@@ -3015,12 +3118,12 @@ export default class LatexParser extends Parser {
 	// @RuleVersion(0)
 	public u_block(): U_blockContext {
 		let localctx: U_blockContext = new U_blockContext(this, this._ctx, this.state);
-		this.enterRule(localctx, 60, LatexParser.RULE_u_block);
+		this.enterRule(localctx, 62, LatexParser.RULE_u_block);
 		let _la: number;
 		try {
 			this.enterOuterAlt(localctx, 1);
 			{
-			this.state = 651;
+			this.state = 674;
 			_la = this._input.LA(1);
 			if(!(_la===1 || _la===2)) {
 			this._errHandler.recoverInline(this);
@@ -3029,11 +3132,11 @@ export default class LatexParser extends Parser {
 				this._errHandler.reportMatch(this);
 			    this.consume();
 			}
-			this.state = 652;
+			this.state = 675;
 			this.u_expr(0);
-			this.state = 653;
+			this.state = 676;
 			_la = this._input.LA(1);
-			if(!(_la===77 || _la===78)) {
+			if(!(_la===79 || _la===80)) {
 			this._errHandler.recoverInline(this);
 			}
 			else {
@@ -3059,12 +3162,12 @@ export default class LatexParser extends Parser {
 	// @RuleVersion(0)
 	public u_insert_matrix(): U_insert_matrixContext {
 		let localctx: U_insert_matrixContext = new U_insert_matrixContext(this, this._ctx, this.state);
-		this.enterRule(localctx, 62, LatexParser.RULE_u_insert_matrix);
+		this.enterRule(localctx, 64, LatexParser.RULE_u_insert_matrix);
 		let _la: number;
 		try {
 			this.enterOuterAlt(localctx, 1);
 			{
-			this.state = 655;
+			this.state = 678;
 			_la = this._input.LA(1);
 			if(!(_la===1 || _la===2)) {
 			this._errHandler.recoverInline(this);
@@ -3073,38 +3176,38 @@ export default class LatexParser extends Parser {
 				this._errHandler.reportMatch(this);
 			    this.consume();
 			}
-			this.state = 656;
+			this.state = 679;
 			localctx._numRows = this._input.LT(1);
 			_la = this._input.LA(1);
-			if(!(_la===91 || _la===92)) {
+			if(!(_la===93 || _la===94)) {
 			    localctx._numRows = this._errHandler.recoverInline(this);
 			}
 			else {
 				this._errHandler.reportMatch(this);
 			    this.consume();
 			}
-			this.state = 657;
+			this.state = 680;
 			_la = this._input.LA(1);
-			if(!(_la===82 || _la===84)) {
+			if(!(_la===84 || _la===86)) {
 			this._errHandler.recoverInline(this);
 			}
 			else {
 				this._errHandler.reportMatch(this);
 			    this.consume();
 			}
-			this.state = 658;
+			this.state = 681;
 			localctx._numColumns = this._input.LT(1);
 			_la = this._input.LA(1);
-			if(!(_la===91 || _la===92)) {
+			if(!(_la===93 || _la===94)) {
 			    localctx._numColumns = this._errHandler.recoverInline(this);
 			}
 			else {
 				this._errHandler.reportMatch(this);
 			    this.consume();
 			}
-			this.state = 659;
+			this.state = 682;
 			_la = this._input.LA(1);
-			if(!(_la===77 || _la===78)) {
+			if(!(_la===79 || _la===80)) {
 			this._errHandler.recoverInline(this);
 			}
 			else {
@@ -3130,42 +3233,42 @@ export default class LatexParser extends Parser {
 	// @RuleVersion(0)
 	public u_fraction(): U_fractionContext {
 		let localctx: U_fractionContext = new U_fractionContext(this, this._ctx, this.state);
-		this.enterRule(localctx, 64, LatexParser.RULE_u_fraction);
+		this.enterRule(localctx, 66, LatexParser.RULE_u_fraction);
 		let _la: number;
 		try {
-			this.state = 669;
+			this.state = 692;
 			this._errHandler.sync(this);
 			switch (this._input.LA(1)) {
-			case 79:
+			case 81:
 				this.enterOuterAlt(localctx, 1);
 				{
-				this.state = 661;
+				this.state = 684;
 				this.match(LatexParser.U_CMD_FRAC);
-				this.state = 662;
+				this.state = 685;
 				this.match(LatexParser.U_L_BRACE);
-				this.state = 663;
+				this.state = 686;
 				_la = this._input.LA(1);
-				if(!(_la===91 || _la===92)) {
+				if(!(_la===93 || _la===94)) {
 				this._errHandler.recoverInline(this);
 				}
 				else {
 					this._errHandler.reportMatch(this);
 				    this.consume();
 				}
-				this.state = 664;
+				this.state = 687;
 				this.match(LatexParser.U_R_BRACE);
-				this.state = 665;
+				this.state = 688;
 				this.match(LatexParser.U_L_BRACE);
-				this.state = 666;
+				this.state = 689;
 				this.match(LatexParser.U_NUMBER);
-				this.state = 667;
+				this.state = 690;
 				this.match(LatexParser.U_R_BRACE);
 				}
 				break;
-			case 80:
+			case 82:
 				this.enterOuterAlt(localctx, 2);
 				{
-				this.state = 668;
+				this.state = 691;
 				this.match(LatexParser.U_CMD_FRAC_INTS);
 				}
 				break;
@@ -3200,90 +3303,90 @@ export default class LatexParser extends Parser {
 		let _parentState: number = this.state;
 		let localctx: U_exprContext = new U_exprContext(this, this._ctx, _parentState);
 		let _prevctx: U_exprContext = localctx;
-		let _startState: number = 66;
-		this.enterRecursionRule(localctx, 66, LatexParser.RULE_u_expr, _p);
+		let _startState: number = 68;
+		this.enterRecursionRule(localctx, 68, LatexParser.RULE_u_expr, _p);
 		try {
 			let _alt: number;
 			this.enterOuterAlt(localctx, 1);
 			{
-			this.state = 693;
+			this.state = 716;
 			this._errHandler.sync(this);
 			switch (this._input.LA(1)) {
-			case 83:
+			case 85:
 				{
 				localctx = new UnitSqrtContext(this, localctx);
 				this._ctx = localctx;
 				_prevctx = localctx;
 
-				this.state = 672;
+				this.state = 695;
 				this.match(LatexParser.U_CMD_SQRT);
-				this.state = 673;
+				this.state = 696;
 				this.match(LatexParser.U_L_BRACE);
-				this.state = 674;
+				this.state = 697;
 				this.expr(0);
-				this.state = 675;
+				this.state = 698;
 				this.match(LatexParser.U_R_BRACE);
 				}
 				break;
-			case 79:
+			case 81:
 				{
 				localctx = new UnitDivideContext(this, localctx);
 				this._ctx = localctx;
 				_prevctx = localctx;
-				this.state = 677;
+				this.state = 700;
 				this.match(LatexParser.U_CMD_FRAC);
-				this.state = 678;
+				this.state = 701;
 				this.match(LatexParser.U_L_BRACE);
-				this.state = 681;
+				this.state = 704;
 				this._errHandler.sync(this);
 				switch (this._input.LA(1)) {
-				case 79:
-				case 83:
-				case 86:
-				case 87:
+				case 81:
+				case 85:
+				case 88:
+				case 89:
 					{
-					this.state = 679;
+					this.state = 702;
 					this.u_expr(0);
 					}
 					break;
-				case 91:
+				case 93:
 					{
-					this.state = 680;
+					this.state = 703;
 					this.match(LatexParser.U_ONE);
 					}
 					break;
 				default:
 					throw new NoViableAltException(this);
 				}
-				this.state = 683;
+				this.state = 706;
 				this.match(LatexParser.U_R_BRACE);
-				this.state = 684;
+				this.state = 707;
 				this.match(LatexParser.U_L_BRACE);
-				this.state = 685;
+				this.state = 708;
 				this.u_expr(0);
-				this.state = 686;
+				this.state = 709;
 				this.match(LatexParser.U_R_BRACE);
 				}
 				break;
-			case 86:
+			case 88:
 				{
 				localctx = new UnitNameContext(this, localctx);
 				this._ctx = localctx;
 				_prevctx = localctx;
-				this.state = 688;
+				this.state = 711;
 				this.match(LatexParser.U_NAME);
 				}
 				break;
-			case 87:
+			case 89:
 				{
 				localctx = new UnitSubExprContext(this, localctx);
 				this._ctx = localctx;
 				_prevctx = localctx;
-				this.state = 689;
+				this.state = 712;
 				this.match(LatexParser.U_L_PAREN);
-				this.state = 690;
+				this.state = 713;
 				this.u_expr(0);
-				this.state = 691;
+				this.state = 714;
 				this.match(LatexParser.U_R_PAREN);
 				}
 				break;
@@ -3291,9 +3394,9 @@ export default class LatexParser extends Parser {
 				throw new NoViableAltException(this);
 			}
 			this._ctx.stop = this._input.LT(-1);
-			this.state = 717;
+			this.state = 740;
 			this._errHandler.sync(this);
-			_alt = this._interp.adaptivePredict(this._input, 53, this._ctx);
+			_alt = this._interp.adaptivePredict(this._input, 54, this._ctx);
 			while (_alt !== 2 && _alt !== ATN.INVALID_ALT_NUMBER) {
 				if (_alt === 1) {
 					if (this._parseListeners != null) {
@@ -3301,20 +3404,20 @@ export default class LatexParser extends Parser {
 					}
 					_prevctx = localctx;
 					{
-					this.state = 715;
+					this.state = 738;
 					this._errHandler.sync(this);
-					switch ( this._interp.adaptivePredict(this._input, 52, this._ctx) ) {
+					switch ( this._interp.adaptivePredict(this._input, 53, this._ctx) ) {
 					case 1:
 						{
 						localctx = new UnitMultiplyContext(this, new U_exprContext(this, _parentctx, _parentState));
 						this.pushNewRecursionContext(localctx, _startState, LatexParser.RULE_u_expr);
-						this.state = 695;
+						this.state = 718;
 						if (!(this.precpred(this._ctx, 4))) {
 							throw this.createFailedPredicateException("this.precpred(this._ctx, 4)");
 						}
-						this.state = 696;
+						this.state = 719;
 						this.match(LatexParser.U_CMD_CDOT);
-						this.state = 697;
+						this.state = 720;
 						this.u_expr(5);
 						}
 						break;
@@ -3322,13 +3425,13 @@ export default class LatexParser extends Parser {
 						{
 						localctx = new UnitExponentContext(this, new U_exprContext(this, _parentctx, _parentState));
 						this.pushNewRecursionContext(localctx, _startState, LatexParser.RULE_u_expr);
-						this.state = 698;
+						this.state = 721;
 						if (!(this.precpred(this._ctx, 9))) {
 							throw this.createFailedPredicateException("this.precpred(this._ctx, 9)");
 						}
-						this.state = 699;
+						this.state = 722;
 						this.match(LatexParser.U_CARET);
-						this.state = 700;
+						this.state = 723;
 						this.match(LatexParser.U_NUMBER);
 						}
 						break;
@@ -3336,17 +3439,17 @@ export default class LatexParser extends Parser {
 						{
 						localctx = new UnitExponentContext(this, new U_exprContext(this, _parentctx, _parentState));
 						this.pushNewRecursionContext(localctx, _startState, LatexParser.RULE_u_expr);
-						this.state = 701;
+						this.state = 724;
 						if (!(this.precpred(this._ctx, 8))) {
 							throw this.createFailedPredicateException("this.precpred(this._ctx, 8)");
 						}
-						this.state = 702;
+						this.state = 725;
 						this.match(LatexParser.U_CARET);
-						this.state = 703;
+						this.state = 726;
 						this.match(LatexParser.U_L_BRACE);
-						this.state = 704;
+						this.state = 727;
 						this.match(LatexParser.U_NUMBER);
-						this.state = 705;
+						this.state = 728;
 						this.match(LatexParser.U_R_BRACE);
 						}
 						break;
@@ -3354,13 +3457,13 @@ export default class LatexParser extends Parser {
 						{
 						localctx = new UnitFractionalExponentContext(this, new U_exprContext(this, _parentctx, _parentState));
 						this.pushNewRecursionContext(localctx, _startState, LatexParser.RULE_u_expr);
-						this.state = 706;
+						this.state = 729;
 						if (!(this.precpred(this._ctx, 7))) {
 							throw this.createFailedPredicateException("this.precpred(this._ctx, 7)");
 						}
-						this.state = 707;
+						this.state = 730;
 						this.match(LatexParser.U_CARET);
-						this.state = 708;
+						this.state = 731;
 						this.u_fraction();
 						}
 						break;
@@ -3368,26 +3471,26 @@ export default class LatexParser extends Parser {
 						{
 						localctx = new UnitFractionalExponentContext(this, new U_exprContext(this, _parentctx, _parentState));
 						this.pushNewRecursionContext(localctx, _startState, LatexParser.RULE_u_expr);
-						this.state = 709;
+						this.state = 732;
 						if (!(this.precpred(this._ctx, 6))) {
 							throw this.createFailedPredicateException("this.precpred(this._ctx, 6)");
 						}
-						this.state = 710;
+						this.state = 733;
 						this.match(LatexParser.U_CARET);
-						this.state = 711;
+						this.state = 734;
 						this.match(LatexParser.U_L_BRACE);
-						this.state = 712;
+						this.state = 735;
 						this.u_fraction();
-						this.state = 713;
+						this.state = 736;
 						this.match(LatexParser.U_R_BRACE);
 						}
 						break;
 					}
 					}
 				}
-				this.state = 719;
+				this.state = 742;
 				this._errHandler.sync(this);
-				_alt = this._interp.adaptivePredict(this._input, 53, this._ctx);
+				_alt = this._interp.adaptivePredict(this._input, 54, this._ctx);
 			}
 			}
 		}
@@ -3408,9 +3511,9 @@ export default class LatexParser extends Parser {
 
 	public sempred(localctx: RuleContext, ruleIndex: number, predIndex: number): boolean {
 		switch (ruleIndex) {
-		case 29:
+		case 30:
 			return this.expr_sempred(localctx as ExprContext, predIndex);
-		case 33:
+		case 34:
 			return this.u_expr_sempred(localctx as U_exprContext, predIndex);
 		}
 		return true;
@@ -3418,23 +3521,23 @@ export default class LatexParser extends Parser {
 	private expr_sempred(localctx: ExprContext, predIndex: number): boolean {
 		switch (predIndex) {
 		case 0:
-			return this.precpred(this._ctx, 29);
+			return this.precpred(this._ctx, 30);
 		case 1:
-			return this.precpred(this._ctx, 28);
+			return this.precpred(this._ctx, 29);
 		case 2:
-			return this.precpred(this._ctx, 25);
+			return this.precpred(this._ctx, 26);
 		case 3:
-			return this.precpred(this._ctx, 24);
+			return this.precpred(this._ctx, 25);
 		case 4:
-			return this.precpred(this._ctx, 51);
+			return this.precpred(this._ctx, 53);
 		case 5:
-			return this.precpred(this._ctx, 50);
+			return this.precpred(this._ctx, 52);
 		case 6:
-			return this.precpred(this._ctx, 49);
+			return this.precpred(this._ctx, 51);
 		case 7:
-			return this.precpred(this._ctx, 48);
+			return this.precpred(this._ctx, 50);
 		case 8:
-			return this.precpred(this._ctx, 47);
+			return this.precpred(this._ctx, 49);
 		case 9:
 			return this.precpred(this._ctx, 18);
 		case 10:
@@ -3480,251 +3583,258 @@ export default class LatexParser extends Parser {
 		return true;
 	}
 
-	public static readonly _serializedATN: number[] = [4,1,99,721,2,0,7,0,2,
-	1,7,1,2,2,7,2,2,3,7,3,2,4,7,4,2,5,7,5,2,6,7,6,2,7,7,7,2,8,7,8,2,9,7,9,2,
-	10,7,10,2,11,7,11,2,12,7,12,2,13,7,13,2,14,7,14,2,15,7,15,2,16,7,16,2,17,
-	7,17,2,18,7,18,2,19,7,19,2,20,7,20,2,21,7,21,2,22,7,22,2,23,7,23,2,24,7,
-	24,2,25,7,25,2,26,7,26,2,27,7,27,2,28,7,28,2,29,7,29,2,30,7,30,2,31,7,31,
-	2,32,7,32,2,33,7,33,1,0,1,0,1,0,1,0,1,0,1,0,1,0,1,0,1,0,1,0,1,0,1,0,1,0,
-	1,0,1,0,1,0,1,0,3,0,86,8,0,1,0,1,0,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,
-	1,1,3,1,100,8,1,1,1,3,1,103,8,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,
-	1,1,3,1,116,8,1,1,2,1,2,1,2,1,2,1,2,1,2,1,2,1,2,1,2,1,2,1,2,1,2,1,2,1,2,
-	3,2,132,8,2,1,2,1,2,1,2,1,2,1,2,1,2,1,2,1,2,1,2,1,2,1,2,3,2,145,8,2,1,3,
-	5,3,148,8,3,10,3,12,3,151,9,3,1,3,1,3,5,3,155,8,3,10,3,12,3,158,9,3,4,3,
-	160,8,3,11,3,12,3,161,1,4,1,4,1,5,3,5,167,8,5,1,5,1,5,1,6,1,6,1,6,3,6,174,
-	8,6,1,6,1,6,1,7,1,7,3,7,180,8,7,1,7,1,7,1,7,1,8,1,8,1,8,4,8,188,8,8,11,
-	8,12,8,189,1,9,1,9,1,9,3,9,195,8,9,1,10,1,10,1,10,3,10,200,8,10,1,11,1,
-	11,1,11,1,11,1,12,1,12,3,12,208,8,12,1,12,1,12,1,12,1,12,1,12,1,12,5,12,
-	216,8,12,10,12,12,12,219,9,12,1,12,1,12,1,13,1,13,1,13,1,13,1,13,1,13,1,
-	14,3,14,230,8,14,1,14,1,14,1,14,1,14,1,14,1,15,1,15,1,15,1,15,1,15,1,15,
-	1,15,3,15,244,8,15,1,15,1,15,1,15,1,15,1,15,1,15,1,15,1,15,1,15,3,15,255,
-	8,15,1,15,1,15,1,15,1,15,1,16,1,16,1,16,1,16,1,16,1,16,3,16,267,8,16,1,
-	16,1,16,1,16,1,16,1,16,1,16,3,16,275,8,16,1,16,1,16,1,16,1,16,1,16,1,16,
-	1,16,1,16,1,16,3,16,286,8,16,1,16,1,16,1,16,1,16,1,17,1,17,1,17,1,17,1,
-	17,1,17,1,17,1,17,3,17,300,8,17,1,17,1,17,1,17,1,17,1,17,1,17,1,17,1,17,
-	3,17,310,8,17,1,17,1,17,1,17,1,17,1,17,1,17,1,17,1,17,1,18,1,18,1,18,1,
-	18,1,18,1,18,1,18,1,18,3,18,328,8,18,1,18,1,18,1,18,1,18,1,18,1,18,3,18,
-	336,8,18,1,18,1,18,1,18,1,18,1,18,1,18,1,18,1,18,3,18,346,8,18,1,18,1,18,
-	1,18,1,18,1,18,1,18,1,18,1,18,1,18,3,18,357,8,18,1,18,1,18,1,18,1,18,1,
-	18,1,19,1,19,1,19,1,19,1,19,1,19,1,19,1,19,1,19,1,19,3,19,374,8,19,1,20,
-	1,20,3,20,378,8,20,1,21,1,21,1,21,4,21,383,8,21,11,21,12,21,384,1,22,1,
-	22,1,22,1,22,3,22,391,8,22,1,23,1,23,1,23,4,23,396,8,23,11,23,12,23,397,
-	1,24,1,24,1,24,1,24,1,25,1,25,1,25,1,25,1,25,1,25,1,26,1,26,1,26,5,26,413,
-	8,26,10,26,12,26,416,9,26,1,27,1,27,1,27,1,27,1,27,5,27,423,8,27,10,27,
-	12,27,426,9,27,1,27,1,27,1,27,1,27,1,27,3,27,433,8,27,1,28,1,28,1,28,1,
-	28,1,28,1,28,3,28,441,8,28,1,28,1,28,1,28,1,28,5,28,447,8,28,10,28,12,28,
-	450,9,28,1,28,1,28,1,29,1,29,1,29,1,29,1,29,1,29,1,29,1,29,1,29,1,29,1,
-	29,1,29,1,29,1,29,1,29,1,29,1,29,1,29,1,29,1,29,1,29,1,29,1,29,1,29,1,29,
-	5,29,479,8,29,10,29,12,29,482,9,29,1,29,1,29,1,29,1,29,1,29,1,29,1,29,1,
-	29,3,29,492,8,29,1,29,1,29,1,29,1,29,1,29,1,29,3,29,500,8,29,1,29,1,29,
-	1,29,1,29,1,29,1,29,1,29,1,29,1,29,1,29,1,29,1,29,1,29,1,29,1,29,1,29,1,
-	29,1,29,1,29,1,29,1,29,1,29,1,29,1,29,1,29,1,29,1,29,1,29,1,29,1,29,1,29,
-	1,29,1,29,1,29,1,29,1,29,1,29,1,29,1,29,1,29,1,29,1,29,1,29,1,29,1,29,1,
-	29,1,29,1,29,1,29,1,29,1,29,1,29,1,29,1,29,1,29,1,29,1,29,1,29,3,29,560,
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-	29,0,517,518,5,7,0,0,518,583,1,0,0,0,519,520,5,9,0,0,520,521,3,58,29,0,
-	521,522,5,9,0,0,522,583,1,0,0,0,523,524,5,8,0,0,524,525,3,58,29,0,525,526,
-	5,8,0,0,526,583,1,0,0,0,527,583,3,12,6,0,528,583,3,10,5,0,529,530,5,53,
-	0,0,530,583,3,58,29,30,531,532,5,18,0,0,532,533,5,4,0,0,533,534,3,58,29,
-	0,534,535,5,5,0,0,535,536,5,4,0,0,536,537,3,58,29,0,537,538,5,5,0,0,538,
-	583,1,0,0,0,539,583,5,19,0,0,540,583,3,8,4,0,541,583,3,54,27,0,542,583,
-	3,56,28,0,543,583,5,12,0,0,544,545,5,6,0,0,545,546,3,58,29,0,546,547,5,
-	7,0,0,547,583,1,0,0,0,548,549,3,10,5,0,549,550,3,58,29,12,550,583,1,0,0,
-	0,551,552,3,12,6,0,552,553,3,58,29,11,553,583,1,0,0,0,554,555,5,12,0,0,
-	555,583,3,58,29,10,556,559,5,26,0,0,557,558,5,4,0,0,558,560,5,5,0,0,559,
-	557,1,0,0,0,559,560,1,0,0,0,560,583,1,0,0,0,561,562,5,17,0,0,562,563,5,
-	4,0,0,563,564,3,58,29,0,564,565,5,5,0,0,565,567,1,0,0,0,566,561,1,0,0,0,
-	566,567,1,0,0,0,567,571,1,0,0,0,568,572,5,61,0,0,569,572,3,10,5,0,570,572,
-	5,55,0,0,571,568,1,0,0,0,571,569,1,0,0,0,571,570,1,0,0,0,571,572,1,0,0,
-	0,572,573,1,0,0,0,573,574,5,17,0,0,574,575,5,4,0,0,575,576,3,58,29,0,576,
-	580,5,5,0,0,577,581,5,61,0,0,578,581,3,10,5,0,579,581,5,55,0,0,580,577,
-	1,0,0,0,580,578,1,0,0,0,580,579,1,0,0,0,580,581,1,0,0,0,581,583,1,0,0,0,
-	582,453,1,0,0,0,582,457,1,0,0,0,582,461,1,0,0,0,582,468,1,0,0,0,582,469,
-	1,0,0,0,582,474,1,0,0,0,582,485,1,0,0,0,582,486,1,0,0,0,582,487,1,0,0,0,
-	582,488,1,0,0,0,582,489,1,0,0,0,582,491,1,0,0,0,582,499,1,0,0,0,582,506,
-	1,0,0,0,582,514,1,0,0,0,582,519,1,0,0,0,582,523,1,0,0,0,582,527,1,0,0,0,
-	582,528,1,0,0,0,582,529,1,0,0,0,582,531,1,0,0,0,582,539,1,0,0,0,582,540,
-	1,0,0,0,582,541,1,0,0,0,582,542,1,0,0,0,582,543,1,0,0,0,582,544,1,0,0,0,
-	582,548,1,0,0,0,582,551,1,0,0,0,582,554,1,0,0,0,582,556,1,0,0,0,582,566,
-	1,0,0,0,583,648,1,0,0,0,584,585,10,29,0,0,585,586,5,21,0,0,586,647,3,58,
-	29,30,587,588,10,28,0,0,588,589,5,20,0,0,589,647,3,58,29,29,590,591,10,
-	25,0,0,591,592,5,53,0,0,592,647,3,58,29,26,593,594,10,24,0,0,594,595,5,
-	52,0,0,595,647,3,58,29,25,596,597,10,51,0,0,597,647,7,2,0,0,598,599,10,
-	50,0,0,599,600,5,54,0,0,600,601,5,4,0,0,601,602,3,58,29,0,602,603,5,5,0,
-	0,603,647,1,0,0,0,604,605,10,49,0,0,605,606,5,10,0,0,606,607,5,4,0,0,607,
-	608,3,58,29,0,608,609,5,60,0,0,609,610,3,58,29,0,610,611,5,5,0,0,611,647,
-	1,0,0,0,612,613,10,48,0,0,613,647,5,27,0,0,614,615,10,47,0,0,615,647,5,
-	11,0,0,616,617,10,18,0,0,617,618,5,10,0,0,618,619,5,4,0,0,619,647,5,5,0,
-	0,620,621,10,17,0,0,621,622,5,54,0,0,622,623,5,4,0,0,623,647,5,5,0,0,624,
-	625,10,16,0,0,625,647,3,8,4,0,626,627,10,15,0,0,627,647,3,10,5,0,628,629,
-	10,14,0,0,629,647,3,12,6,0,630,631,10,13,0,0,631,647,5,12,0,0,632,633,10,
-	9,0,0,633,647,3,54,27,0,634,635,10,8,0,0,635,647,3,56,28,0,636,637,10,7,
-	0,0,637,647,3,28,14,0,638,639,10,6,0,0,639,647,3,30,15,0,640,641,10,5,0,
-	0,641,647,3,32,16,0,642,643,10,4,0,0,643,647,3,34,17,0,644,645,10,3,0,0,
-	645,647,3,36,18,0,646,584,1,0,0,0,646,587,1,0,0,0,646,590,1,0,0,0,646,593,
-	1,0,0,0,646,596,1,0,0,0,646,598,1,0,0,0,646,604,1,0,0,0,646,612,1,0,0,0,
-	646,614,1,0,0,0,646,616,1,0,0,0,646,620,1,0,0,0,646,624,1,0,0,0,646,626,
-	1,0,0,0,646,628,1,0,0,0,646,630,1,0,0,0,646,632,1,0,0,0,646,634,1,0,0,0,
-	646,636,1,0,0,0,646,638,1,0,0,0,646,640,1,0,0,0,646,642,1,0,0,0,646,644,
-	1,0,0,0,647,650,1,0,0,0,648,646,1,0,0,0,648,649,1,0,0,0,649,59,1,0,0,0,
-	650,648,1,0,0,0,651,652,7,7,0,0,652,653,3,66,33,0,653,654,7,8,0,0,654,61,
-	1,0,0,0,655,656,7,7,0,0,656,657,7,9,0,0,657,658,7,10,0,0,658,659,7,9,0,
-	0,659,660,7,8,0,0,660,63,1,0,0,0,661,662,5,79,0,0,662,663,5,89,0,0,663,
-	664,7,9,0,0,664,665,5,90,0,0,665,666,5,89,0,0,666,667,5,92,0,0,667,670,
-	5,90,0,0,668,670,5,80,0,0,669,661,1,0,0,0,669,668,1,0,0,0,670,65,1,0,0,
-	0,671,672,6,33,-1,0,672,673,5,83,0,0,673,674,5,89,0,0,674,675,3,58,29,0,
-	675,676,5,90,0,0,676,694,1,0,0,0,677,678,5,79,0,0,678,681,5,89,0,0,679,
-	682,3,66,33,0,680,682,5,91,0,0,681,679,1,0,0,0,681,680,1,0,0,0,682,683,
-	1,0,0,0,683,684,5,90,0,0,684,685,5,89,0,0,685,686,3,66,33,0,686,687,5,90,
-	0,0,687,694,1,0,0,0,688,694,5,86,0,0,689,690,5,87,0,0,690,691,3,66,33,0,
-	691,692,5,88,0,0,692,694,1,0,0,0,693,671,1,0,0,0,693,677,1,0,0,0,693,688,
-	1,0,0,0,693,689,1,0,0,0,694,717,1,0,0,0,695,696,10,4,0,0,696,697,5,81,0,
-	0,697,716,3,66,33,5,698,699,10,9,0,0,699,700,5,85,0,0,700,716,5,92,0,0,
-	701,702,10,8,0,0,702,703,5,85,0,0,703,704,5,89,0,0,704,705,5,92,0,0,705,
-	716,5,90,0,0,706,707,10,7,0,0,707,708,5,85,0,0,708,716,3,64,32,0,709,710,
-	10,6,0,0,710,711,5,85,0,0,711,712,5,89,0,0,712,713,3,64,32,0,713,714,5,
-	90,0,0,714,716,1,0,0,0,715,695,1,0,0,0,715,698,1,0,0,0,715,701,1,0,0,0,
-	715,706,1,0,0,0,715,709,1,0,0,0,716,719,1,0,0,0,717,715,1,0,0,0,717,718,
-	1,0,0,0,718,67,1,0,0,0,719,717,1,0,0,0,54,85,99,102,115,131,144,149,156,
-	161,166,173,179,189,194,199,207,217,229,243,254,266,274,285,299,309,327,
-	335,345,356,373,377,384,390,397,414,424,432,440,448,480,491,499,559,566,
-	571,580,582,646,648,669,681,693,715,717];
+	public static readonly _serializedATN: number[] = [4,1,101,744,2,0,7,0,
+	2,1,7,1,2,2,7,2,2,3,7,3,2,4,7,4,2,5,7,5,2,6,7,6,2,7,7,7,2,8,7,8,2,9,7,9,
+	2,10,7,10,2,11,7,11,2,12,7,12,2,13,7,13,2,14,7,14,2,15,7,15,2,16,7,16,2,
+	17,7,17,2,18,7,18,2,19,7,19,2,20,7,20,2,21,7,21,2,22,7,22,2,23,7,23,2,24,
+	7,24,2,25,7,25,2,26,7,26,2,27,7,27,2,28,7,28,2,29,7,29,2,30,7,30,2,31,7,
+	31,2,32,7,32,2,33,7,33,2,34,7,34,1,0,1,0,1,0,1,0,1,0,1,0,1,0,1,0,1,0,1,
+	0,1,0,1,0,1,0,1,0,1,0,1,0,1,0,3,0,88,8,0,1,0,1,0,1,1,1,1,1,1,1,1,1,1,1,
+	1,1,1,1,1,1,1,1,1,3,1,102,8,1,1,1,3,1,105,8,1,1,1,1,1,1,1,1,1,1,1,1,1,1,
+	1,1,1,1,1,1,1,1,1,3,1,118,8,1,1,2,1,2,1,2,1,2,1,2,1,2,1,2,1,2,1,2,1,2,1,
+	2,1,2,1,2,1,2,3,2,134,8,2,1,2,1,2,1,2,1,2,1,2,1,2,1,2,1,2,1,2,1,2,1,2,3,
+	2,147,8,2,1,3,5,3,150,8,3,10,3,12,3,153,9,3,1,3,1,3,5,3,157,8,3,10,3,12,
+	3,160,9,3,4,3,162,8,3,11,3,12,3,163,1,4,1,4,1,5,3,5,169,8,5,1,5,1,5,1,6,
+	1,6,1,6,3,6,176,8,6,1,6,1,6,1,7,1,7,3,7,182,8,7,1,7,1,7,1,7,1,8,1,8,1,8,
+	4,8,190,8,8,11,8,12,8,191,1,9,1,9,1,9,3,9,197,8,9,1,10,1,10,1,10,3,10,202,
+	8,10,1,11,1,11,1,11,1,11,1,12,1,12,3,12,210,8,12,1,12,1,12,1,12,1,12,1,
+	12,1,12,5,12,218,8,12,10,12,12,12,221,9,12,1,12,1,12,1,13,1,13,1,13,1,13,
+	1,13,1,13,1,14,3,14,232,8,14,1,14,1,14,1,14,1,14,1,14,1,15,1,15,1,15,1,
+	15,1,15,1,15,1,15,3,15,246,8,15,1,15,1,15,1,15,1,15,1,15,1,15,1,15,1,15,
+	1,15,3,15,257,8,15,1,15,1,15,1,15,1,15,1,16,1,16,1,16,1,16,1,16,1,16,3,
+	16,269,8,16,1,16,1,16,1,16,1,16,1,16,1,16,3,16,277,8,16,1,16,1,16,1,16,
+	1,16,1,16,1,16,1,16,1,16,1,16,3,16,288,8,16,1,16,1,16,1,16,1,16,1,17,1,
+	17,1,17,1,17,1,17,1,17,1,17,1,17,1,17,1,17,1,17,1,17,1,17,3,17,307,8,17,
+	1,17,1,17,1,17,1,17,1,18,1,18,1,18,1,18,1,18,1,18,1,18,1,18,3,18,321,8,
+	18,1,18,1,18,1,18,1,18,1,18,1,18,1,18,1,18,3,18,331,8,18,1,18,1,18,1,18,
+	1,18,1,18,1,18,1,18,1,18,1,19,1,19,1,19,1,19,1,19,1,19,1,19,1,19,3,19,349,
+	8,19,1,19,1,19,1,19,1,19,1,19,1,19,3,19,357,8,19,1,19,1,19,1,19,1,19,1,
+	19,1,19,1,19,1,19,3,19,367,8,19,1,19,1,19,1,19,1,19,1,19,1,19,1,19,1,19,
+	1,19,3,19,378,8,19,1,19,1,19,1,19,1,19,1,19,1,20,1,20,1,20,1,20,1,20,1,
+	20,1,20,1,20,1,20,1,20,3,20,395,8,20,1,21,1,21,3,21,399,8,21,1,22,1,22,
+	1,22,4,22,404,8,22,11,22,12,22,405,1,23,1,23,1,23,1,23,3,23,412,8,23,1,
+	24,1,24,1,24,4,24,417,8,24,11,24,12,24,418,1,25,1,25,1,25,1,25,1,26,1,26,
+	1,26,1,26,1,26,1,26,1,27,1,27,1,27,5,27,434,8,27,10,27,12,27,437,9,27,1,
+	28,1,28,1,28,1,28,1,28,5,28,444,8,28,10,28,12,28,447,9,28,1,28,1,28,1,28,
+	1,28,1,28,3,28,454,8,28,1,29,1,29,1,29,1,29,1,29,1,29,3,29,462,8,29,1,29,
+	1,29,1,29,1,29,5,29,468,8,29,10,29,12,29,471,9,29,1,29,1,29,1,30,1,30,1,
+	30,1,30,1,30,1,30,1,30,1,30,1,30,1,30,1,30,1,30,1,30,1,30,1,30,1,30,1,30,
+	1,30,1,30,1,30,1,30,1,30,1,30,1,30,1,30,5,30,500,8,30,10,30,12,30,503,9,
+	30,1,30,1,30,1,30,1,30,1,30,1,30,1,30,1,30,1,30,3,30,514,8,30,1,30,1,30,
+	1,30,1,30,1,30,1,30,3,30,522,8,30,1,30,1,30,1,30,1,30,1,30,1,30,1,30,1,
+	30,1,30,1,30,1,30,1,30,1,30,1,30,1,30,1,30,1,30,1,30,1,30,1,30,1,30,1,30,
+	1,30,1,30,1,30,1,30,1,30,1,30,1,30,1,30,1,30,1,30,1,30,1,30,1,30,1,30,1,
+	30,1,30,1,30,1,30,1,30,1,30,1,30,1,30,1,30,1,30,1,30,1,30,1,30,1,30,1,30,
+	1,30,1,30,1,30,1,30,1,30,1,30,1,30,1,30,3,30,583,8,30,1,30,1,30,1,30,1,
+	30,1,30,3,30,590,8,30,1,30,1,30,1,30,3,30,595,8,30,1,30,1,30,1,30,1,30,
+	1,30,1,30,1,30,3,30,604,8,30,3,30,606,8,30,1,30,1,30,1,30,1,30,1,30,1,30,
+	1,30,1,30,1,30,1,30,1,30,1,30,1,30,1,30,1,30,1,30,1,30,1,30,1,30,1,30,1,
+	30,1,30,1,30,1,30,1,30,1,30,1,30,1,30,1,30,1,30,1,30,1,30,1,30,1,30,1,30,
+	1,30,1,30,1,30,1,30,1,30,1,30,1,30,1,30,1,30,1,30,1,30,1,30,1,30,1,30,1,
+	30,1,30,1,30,1,30,1,30,1,30,1,30,1,30,1,30,1,30,1,30,1,30,1,30,5,30,670,
+	8,30,10,30,12,30,673,9,30,1,31,1,31,1,31,1,31,1,32,1,32,1,32,1,32,1,32,
+	1,32,1,33,1,33,1,33,1,33,1,33,1,33,1,33,1,33,3,33,693,8,33,1,34,1,34,1,
+	34,1,34,1,34,1,34,1,34,1,34,1,34,1,34,3,34,705,8,34,1,34,1,34,1,34,1,34,
+	1,34,1,34,1,34,1,34,1,34,1,34,3,34,717,8,34,1,34,1,34,1,34,1,34,1,34,1,
+	34,1,34,1,34,1,34,1,34,1,34,1,34,1,34,1,34,1,34,1,34,1,34,1,34,1,34,1,34,
+	5,34,739,8,34,10,34,12,34,742,9,34,1,34,2,151,158,2,60,68,35,0,2,4,6,8,
+	10,12,14,16,18,20,22,24,26,28,30,32,34,36,38,40,42,44,46,48,50,52,54,56,
+	58,60,62,64,66,68,0,11,1,0,32,44,1,0,16,17,1,0,64,65,2,0,58,58,60,60,1,
+	0,26,27,1,0,58,61,1,0,48,49,1,0,1,2,1,0,79,80,1,0,93,94,2,0,84,84,86,86,
+	843,0,87,1,0,0,0,2,101,1,0,0,0,4,119,1,0,0,0,6,151,1,0,0,0,8,165,1,0,0,
+	0,10,168,1,0,0,0,12,175,1,0,0,0,14,181,1,0,0,0,16,186,1,0,0,0,18,193,1,
+	0,0,0,20,198,1,0,0,0,22,203,1,0,0,0,24,209,1,0,0,0,26,224,1,0,0,0,28,231,
+	1,0,0,0,30,245,1,0,0,0,32,268,1,0,0,0,34,293,1,0,0,0,36,312,1,0,0,0,38,
+	340,1,0,0,0,40,394,1,0,0,0,42,398,1,0,0,0,44,400,1,0,0,0,46,407,1,0,0,0,
+	48,413,1,0,0,0,50,420,1,0,0,0,52,424,1,0,0,0,54,430,1,0,0,0,56,438,1,0,
+	0,0,58,461,1,0,0,0,60,605,1,0,0,0,62,674,1,0,0,0,64,678,1,0,0,0,66,692,
+	1,0,0,0,68,716,1,0,0,0,70,88,3,14,7,0,71,88,3,16,8,0,72,88,3,18,9,0,73,
+	88,3,20,10,0,74,88,3,22,11,0,75,88,3,62,31,0,76,88,3,10,5,0,77,88,3,8,4,
+	0,78,88,3,44,22,0,79,88,3,46,23,0,80,88,3,48,24,0,81,88,3,60,30,0,82,88,
+	3,42,21,0,83,88,3,24,12,0,84,88,3,6,3,0,85,88,3,2,1,0,86,88,3,4,2,0,87,
+	70,1,0,0,0,87,71,1,0,0,0,87,72,1,0,0,0,87,73,1,0,0,0,87,74,1,0,0,0,87,75,
+	1,0,0,0,87,76,1,0,0,0,87,77,1,0,0,0,87,78,1,0,0,0,87,79,1,0,0,0,87,80,1,
+	0,0,0,87,81,1,0,0,0,87,82,1,0,0,0,87,83,1,0,0,0,87,84,1,0,0,0,87,85,1,0,
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+	22,0,0,612,670,3,60,30,30,613,614,10,26,0,0,614,615,5,55,0,0,615,670,3,
+	60,30,27,616,617,10,25,0,0,617,618,5,54,0,0,618,670,3,60,30,26,619,620,
+	10,53,0,0,620,670,7,2,0,0,621,622,10,52,0,0,622,623,5,56,0,0,623,624,5,
+	4,0,0,624,625,3,60,30,0,625,626,5,5,0,0,626,670,1,0,0,0,627,628,10,51,0,
+	0,628,629,5,10,0,0,629,630,5,4,0,0,630,631,3,60,30,0,631,632,5,62,0,0,632,
+	633,3,60,30,0,633,634,5,5,0,0,634,670,1,0,0,0,635,636,10,50,0,0,636,670,
+	5,29,0,0,637,638,10,49,0,0,638,670,5,11,0,0,639,640,10,18,0,0,640,641,5,
+	10,0,0,641,642,5,4,0,0,642,670,5,5,0,0,643,644,10,17,0,0,644,645,5,56,0,
+	0,645,646,5,4,0,0,646,670,5,5,0,0,647,648,10,16,0,0,648,670,3,8,4,0,649,
+	650,10,15,0,0,650,670,3,10,5,0,651,652,10,14,0,0,652,670,3,12,6,0,653,654,
+	10,13,0,0,654,670,5,12,0,0,655,656,10,9,0,0,656,670,3,56,28,0,657,658,10,
+	8,0,0,658,670,3,58,29,0,659,660,10,7,0,0,660,670,3,28,14,0,661,662,10,6,
+	0,0,662,670,3,30,15,0,663,664,10,5,0,0,664,670,3,32,16,0,665,666,10,4,0,
+	0,666,670,3,36,18,0,667,668,10,3,0,0,668,670,3,38,19,0,669,607,1,0,0,0,
+	669,610,1,0,0,0,669,613,1,0,0,0,669,616,1,0,0,0,669,619,1,0,0,0,669,621,
+	1,0,0,0,669,627,1,0,0,0,669,635,1,0,0,0,669,637,1,0,0,0,669,639,1,0,0,0,
+	669,643,1,0,0,0,669,647,1,0,0,0,669,649,1,0,0,0,669,651,1,0,0,0,669,653,
+	1,0,0,0,669,655,1,0,0,0,669,657,1,0,0,0,669,659,1,0,0,0,669,661,1,0,0,0,
+	669,663,1,0,0,0,669,665,1,0,0,0,669,667,1,0,0,0,670,673,1,0,0,0,671,669,
+	1,0,0,0,671,672,1,0,0,0,672,61,1,0,0,0,673,671,1,0,0,0,674,675,7,7,0,0,
+	675,676,3,68,34,0,676,677,7,8,0,0,677,63,1,0,0,0,678,679,7,7,0,0,679,680,
+	7,9,0,0,680,681,7,10,0,0,681,682,7,9,0,0,682,683,7,8,0,0,683,65,1,0,0,0,
+	684,685,5,81,0,0,685,686,5,91,0,0,686,687,7,9,0,0,687,688,5,92,0,0,688,
+	689,5,91,0,0,689,690,5,94,0,0,690,693,5,92,0,0,691,693,5,82,0,0,692,684,
+	1,0,0,0,692,691,1,0,0,0,693,67,1,0,0,0,694,695,6,34,-1,0,695,696,5,85,0,
+	0,696,697,5,91,0,0,697,698,3,60,30,0,698,699,5,92,0,0,699,717,1,0,0,0,700,
+	701,5,81,0,0,701,704,5,91,0,0,702,705,3,68,34,0,703,705,5,93,0,0,704,702,
+	1,0,0,0,704,703,1,0,0,0,705,706,1,0,0,0,706,707,5,92,0,0,707,708,5,91,0,
+	0,708,709,3,68,34,0,709,710,5,92,0,0,710,717,1,0,0,0,711,717,5,88,0,0,712,
+	713,5,89,0,0,713,714,3,68,34,0,714,715,5,90,0,0,715,717,1,0,0,0,716,694,
+	1,0,0,0,716,700,1,0,0,0,716,711,1,0,0,0,716,712,1,0,0,0,717,740,1,0,0,0,
+	718,719,10,4,0,0,719,720,5,83,0,0,720,739,3,68,34,5,721,722,10,9,0,0,722,
+	723,5,87,0,0,723,739,5,94,0,0,724,725,10,8,0,0,725,726,5,87,0,0,726,727,
+	5,91,0,0,727,728,5,94,0,0,728,739,5,92,0,0,729,730,10,7,0,0,730,731,5,87,
+	0,0,731,739,3,66,33,0,732,733,10,6,0,0,733,734,5,87,0,0,734,735,5,91,0,
+	0,735,736,3,66,33,0,736,737,5,92,0,0,737,739,1,0,0,0,738,718,1,0,0,0,738,
+	721,1,0,0,0,738,724,1,0,0,0,738,729,1,0,0,0,738,732,1,0,0,0,739,742,1,0,
+	0,0,740,738,1,0,0,0,740,741,1,0,0,0,741,69,1,0,0,0,742,740,1,0,0,0,55,87,
+	101,104,117,133,146,151,158,163,168,175,181,191,196,201,209,219,231,245,
+	256,268,276,287,306,320,330,348,356,366,377,394,398,405,411,418,435,445,
+	453,461,469,501,513,521,582,589,594,603,605,669,671,692,704,716,738,740];
 
 	private static __ATN: ATN;
 	public static get _ATN(): ATN {
@@ -4481,6 +4591,70 @@ export class Integral_cmdContext extends ParserRuleContext {
 }
 
 
+export class Summation_cmdContext extends ParserRuleContext {
+	public _start_expr!: ExprContext;
+	public _end_expr!: ExprContext;
+	public _operand_expr!: ExprContext;
+	constructor(parser?: LatexParser, parent?: ParserRuleContext, invokingState?: number) {
+		super(parent, invokingState);
+    	this.parser = parser;
+	}
+	public L_PAREN(): TerminalNode {
+		return this.getToken(LatexParser.L_PAREN, 0);
+	}
+	public R_PAREN(): TerminalNode {
+		return this.getToken(LatexParser.R_PAREN, 0);
+	}
+	public expr_list(): ExprContext[] {
+		return this.getTypedRuleContexts(ExprContext) as ExprContext[];
+	}
+	public expr(i: number): ExprContext {
+		return this.getTypedRuleContext(ExprContext, i) as ExprContext;
+	}
+	public CMD_SUM_UNDERSCORE(): TerminalNode {
+		return this.getToken(LatexParser.CMD_SUM_UNDERSCORE, 0);
+	}
+	public L_BRACE_list(): TerminalNode[] {
+	    	return this.getTokens(LatexParser.L_BRACE);
+	}
+	public L_BRACE(i: number): TerminalNode {
+		return this.getToken(LatexParser.L_BRACE, i);
+	}
+	public id(): IdContext {
+		return this.getTypedRuleContext(IdContext, 0) as IdContext;
+	}
+	public EQ(): TerminalNode {
+		return this.getToken(LatexParser.EQ, 0);
+	}
+	public R_BRACE_list(): TerminalNode[] {
+	    	return this.getTokens(LatexParser.R_BRACE);
+	}
+	public R_BRACE(i: number): TerminalNode {
+		return this.getToken(LatexParser.R_BRACE, i);
+	}
+	public CARET_SINGLE_CHAR_ID(): TerminalNode {
+		return this.getToken(LatexParser.CARET_SINGLE_CHAR_ID, 0);
+	}
+	public CARET_SINGLE_CHAR_NUMBER(): TerminalNode {
+		return this.getToken(LatexParser.CARET_SINGLE_CHAR_NUMBER, 0);
+	}
+	public CARET(): TerminalNode {
+		return this.getToken(LatexParser.CARET, 0);
+	}
+    public get ruleIndex(): number {
+    	return LatexParser.RULE_summation_cmd;
+	}
+	// @Override
+	public accept<Result>(visitor: LatexParserVisitor<Result>): Result {
+		if (visitor.visitSummation_cmd) {
+			return visitor.visitSummation_cmd(this);
+		} else {
+			return visitor.visitChildren(this);
+		}
+	}
+}
+
+
 export class Derivative_cmdContext extends ParserRuleContext {
 	public _MATHRM_0!: Token;
 	public _MATHRM_1!: Token;
@@ -5326,6 +5500,23 @@ export class SubExprContext extends ExprContext {
 		}
 	}
 }
+export class SummationContext extends ExprContext {
+	constructor(parser: LatexParser, ctx: ExprContext) {
+		super(parser, ctx.parentCtx, ctx.invokingState);
+		super.copyFrom(ctx);
+	}
+	public summation_cmd(): Summation_cmdContext {
+		return this.getTypedRuleContext(Summation_cmdContext, 0) as Summation_cmdContext;
+	}
+	// @Override
+	public accept<Result>(visitor: LatexParserVisitor<Result>): Result {
+		if (visitor.visitSummation) {
+			return visitor.visitSummation(this);
+		} else {
+			return visitor.visitChildren(this);
+		}
+	}
+}
 export class NormContext extends ExprContext {
 	constructor(parser: LatexParser, ctx: ExprContext) {
 		super(parser, ctx.parentCtx, ctx.invokingState);
@@ -5665,6 +5856,23 @@ export class BaseLogContext extends ExprContext {
 		}
 	}
 }
+export class InfinityExprContext extends ExprContext {
+	constructor(parser: LatexParser, ctx: ExprContext) {
+		super(parser, ctx.parentCtx, ctx.invokingState);
+		super.copyFrom(ctx);
+	}
+	public INFINITY(): TerminalNode {
+		return this.getToken(LatexParser.INFINITY, 0);
+	}
+	// @Override
+	public accept<Result>(visitor: LatexParserVisitor<Result>): Result {
+		if (visitor.visitInfinityExpr) {
+			return visitor.visitInfinityExpr(this);
+		} else {
+			return visitor.visitChildren(this);
+		}
+	}
+}
 export class AddContext extends ExprContext {
 	constructor(parser: LatexParser, ctx: ExprContext) {
 		super(parser, ctx.parentCtx, ctx.invokingState);
diff --git a/src/parser/LatexParserVisitor.ts b/src/parser/LatexParserVisitor.ts
index 474ff628..35bb503f 100644
--- a/src/parser/LatexParserVisitor.ts
+++ b/src/parser/LatexParserVisitor.ts
@@ -21,6 +21,7 @@ import { Piecewise_argContext } from "./LatexParser";
 import { Trig_functionContext } from "./LatexParser";
 import { Indefinite_integral_cmdContext } from "./LatexParser";
 import { Integral_cmdContext } from "./LatexParser";
+import { Summation_cmdContext } from "./LatexParser";
 import { Derivative_cmdContext } from "./LatexParser";
 import { N_derivative_cmdContext } from "./LatexParser";
 import { ArgumentContext } from "./LatexParser";
@@ -45,6 +46,7 @@ import { DerivativeContext } from "./LatexParser";
 import { UserFunctionContext } from "./LatexParser";
 import { MatrixContext } from "./LatexParser";
 import { SubExprContext } from "./LatexParser";
+import { SummationContext } from "./LatexParser";
 import { NormContext } from "./LatexParser";
 import { EmptyPlaceholderContext } from "./LatexParser";
 import { SqrtContext } from "./LatexParser";
@@ -57,6 +59,7 @@ import { MultiplyContext } from "./LatexParser";
 import { BaseLogSingleCharContext } from "./LatexParser";
 import { ExponentContext } from "./LatexParser";
 import { BaseLogContext } from "./LatexParser";
+import { InfinityExprContext } from "./LatexParser";
 import { AddContext } from "./LatexParser";
 import { SingleIntSqrtContext } from "./LatexParser";
 import { SubtractContext } from "./LatexParser";
@@ -192,6 +195,12 @@ export default class LatexParserVisitor<Result> extends ParseTreeVisitor<Result>
 	 * @return the visitor result
 	 */
 	visitIntegral_cmd?: (ctx: Integral_cmdContext) => Result;
+	/**
+	 * Visit a parse tree produced by `LatexParser.summation_cmd`.
+	 * @param ctx the parse tree
+	 * @return the visitor result
+	 */
+	visitSummation_cmd?: (ctx: Summation_cmdContext) => Result;
 	/**
 	 * Visit a parse tree produced by `LatexParser.derivative_cmd`.
 	 * @param ctx the parse tree
@@ -348,6 +357,13 @@ export default class LatexParserVisitor<Result> extends ParseTreeVisitor<Result>
 	 * @return the visitor result
 	 */
 	visitSubExpr?: (ctx: SubExprContext) => Result;
+	/**
+	 * Visit a parse tree produced by the `summation`
+	 * labeled alternative in `LatexParser.expr`.
+	 * @param ctx the parse tree
+	 * @return the visitor result
+	 */
+	visitSummation?: (ctx: SummationContext) => Result;
 	/**
 	 * Visit a parse tree produced by the `norm`
 	 * labeled alternative in `LatexParser.expr`.
@@ -432,6 +448,13 @@ export default class LatexParserVisitor<Result> extends ParseTreeVisitor<Result>
 	 * @return the visitor result
 	 */
 	visitBaseLog?: (ctx: BaseLogContext) => Result;
+	/**
+	 * Visit a parse tree produced by the `infinityExpr`
+	 * labeled alternative in `LatexParser.expr`.
+	 * @param ctx the parse tree
+	 * @return the visitor result
+	 */
+	visitInfinityExpr?: (ctx: InfinityExprContext) => Result;
 	/**
 	 * Visit a parse tree produced by the `add`
 	 * labeled alternative in `LatexParser.expr`.
diff --git a/src/parser/LatexToSympy.ts b/src/parser/LatexToSympy.ts
index de31d231..d06cb4bd 100644
--- a/src/parser/LatexToSympy.ts
+++ b/src/parser/LatexToSympy.ts
@@ -33,6 +33,7 @@ import {
   type IndefiniteIntegralContext, type Indefinite_integral_cmdContext,
   type Integral_cmdContext, type IntegralContext, type DerivativeContext,
   type Derivative_cmdContext, type NDerivativeContext, type N_derivative_cmdContext,
+  type Summation_cmdContext, type SummationContext,
   type TrigFunctionContext, type UnitExponentContext, type UnitFractionalExponentContext, type SqrtContext,
   type LnContext, type LogContext, type AbsContext, type UnaryMinusContext,
   type BaseLogContext, type UnitSqrtContext, type MultiplyContext, Number_with_unitsContext, type UnitMultiplyContext,
@@ -47,7 +48,8 @@ import {
   type MatrixContext, type IndexContext, type MatrixMultiplyContext, type TransposeContext, type NormContext, 
   type EmptySubscriptContext, type EmptySuperscriptContext, type MissingMultiplicationContext,
   type BuiltinFunctionContext, type UserFunctionContext, type EmptyPlaceholderContext, type Scatter_plot_queryContext,
-  type Parametric_plot_queryContext, type RemoveOperatorFontContext, type FactorialContext
+  type Parametric_plot_queryContext, type RemoveOperatorFontContext, type FactorialContext,
+  type InfinityExprContext
 } from "./LatexParser";
 import { getBlankMatrixLatex } from "../utility";
 
@@ -1086,6 +1088,10 @@ export class LatexToSympy extends LatexParserVisitor<string | Statement | UnitBl
     return "pi";
   }
 
+  visitInfinityExpr = (ctx: InfinityExprContext) => {
+    return "oo";
+  }
+
   visitExponent = (ctx: ExponentContext) => {
     const exponentVariableName = this.getNextUnitlessSubExpressionName();
     
@@ -1810,6 +1816,43 @@ export class LatexToSympy extends LatexParserVisitor<string | Statement | UnitBl
     }
   }
 
+  visitSummation = (ctx: SummationContext) => {
+    const child = ctx.children[0] as Summation_cmdContext;
+
+    const dummyVariable = this.visitId(child.id());
+
+    this.currentDummyVars.add(dummyVariable);
+    const operand: string = this.visit(child._operand_expr) as string;
+    this.currentDummyVars.delete(dummyVariable);
+
+    const start = this.visit(child._start_expr) as string;
+
+    let end: string;
+
+    if (child._end_expr) {
+      end = this.visit(child._end_expr) as string;
+    } else if (child.CARET_SINGLE_CHAR_ID()) {
+      end = this.mapVariableNames(child.CARET_SINGLE_CHAR_ID().toString()[1]);
+      this.params.push(end);
+
+      if (this.inQueryStatement && !this.currentDummyVars.has(end)) {
+        this.subQueryReplacements.push([end,
+          {
+            type: "replacement",
+            location: child.CARET_SINGLE_CHAR_ID().symbol.start+1,
+            deletionLength: 1,
+            text: `{${end}}`
+          }]);
+
+        this.addSubQuery(end);
+      }
+    } else {
+      end = child.CARET_SINGLE_CHAR_NUMBER().toString()[1];
+    }
+
+    return `_summation(Subs(${operand}, ${dummyVariable}, ${dummyVariable}__dummy_var), ${dummyVariable}__dummy_var, ${start}, ${end})`;    
+  }
+
   visitTrigFunction = (ctx: TrigFunctionContext) => {
     let trigFunctionName;
 
diff --git a/tests/test_basic.spec.mjs b/tests/test_basic.spec.mjs
index 7057420e..ffe23256 100644
--- a/tests/test_basic.spec.mjs
+++ b/tests/test_basic.spec.mjs
@@ -1764,7 +1764,7 @@ test('Test factorial function', async () => {
   expect(content).toBe('');
 
   content = await page.textContent('#result-value-6');
-  expect(content).toBe(String.raw`\left(a\right)!`);
+  expect(content).toBe('a!');
   content = await page.textContent('#result-units-6');
   expect(content).toBe('');
 
@@ -1784,7 +1784,10 @@ test('Test factorial error check for non integer input', async () => {
 
   await page.waitForSelector('text=Updating...', {state: 'detached'});
 
-  await expect(page.locator('text=The factorial function can only be evaluated on a nonnegative integer')).toBeVisible();
+  let content = await page.textContent('#result-value-0');
+  expect(parseLatexFloat(content)).toBeCloseTo(1.04648584685356, precision);
+  content = await page.textContent('#result-units-0');
+  expect(content).toBe('');
 });
 
 test('Test factorial error check for negative input', async () => {
@@ -1792,7 +1795,8 @@ test('Test factorial error check for negative input', async () => {
 
   await page.waitForSelector('text=Updating...', {state: 'detached'});
 
-  await expect(page.locator('text=The factorial function can only be evaluated on a nonnegative integer')).toBeVisible();
+  let content = await page.textContent('#result-value-0');
+  expect(content).toBe(String.raw`\tilde{\infty}`);
 });
 
 test('Test factorial error check for input with units', async () => {
diff --git a/tests/test_matrix_indexing.spec.mjs b/tests/test_matrix_indexing.spec.mjs
index 098cdc08..18aa6548 100644
--- a/tests/test_matrix_indexing.spec.mjs
+++ b/tests/test_matrix_indexing.spec.mjs
@@ -81,7 +81,7 @@ test('Zero index', async () => {
 
   await page.waitForSelector('text=Updating...', {state: 'detached'});
 
-  await expect(page.locator("text=Matrix indices must evaluate to a finite real integer and be greater than 0")).toBeVisible();
+  await expect(page.locator("text=Matrix indices must be greater than 0")).toBeVisible();
 });
 
 test('Negative index', async () => {
@@ -89,7 +89,7 @@ test('Negative index', async () => {
 
   await page.waitForSelector('text=Updating...', {state: 'detached'});
 
-  await expect(page.locator("text=Matrix indices must evaluate to a finite real integer and be greater than 0")).toBeVisible();
+  await expect(page.locator("text=Matrix indices must be greater than 0")).toBeVisible();
 });
 
 test('Out of range index', async () => {
@@ -105,7 +105,7 @@ test('Noninteger index', async () => {
 
   await page.waitForSelector('text=Updating...', {state: 'detached'});
 
-  await expect(page.locator("text=Matrix indices must evaluate to a finite real integer and be greater than 0")).toBeVisible();
+  await expect(page.locator("text=IndexError, Invalid index")).toBeVisible();
 });
 
 test('Nonnumeric index', async () => {
@@ -113,7 +113,8 @@ test('Nonnumeric index', async () => {
 
   await page.waitForSelector('text=Updating...', {state: 'detached'});
 
-  await expect(page.locator("text=Matrix indices must evaluate to a finite real integer and be greater than 0")).toBeVisible();
+  let content = await page.textContent('#result-value-0');
+  expect(content).toBe(String.raw`\left[\begin{matrix}a & b\\c & d\\e & f\end{matrix}\right]_{0, z - 1}`);
 });
 
 test('Indexing with expression', async () => {
diff --git a/tests/test_sum_and_prod.spec.mjs b/tests/test_sum_and_prod.spec.mjs
new file mode 100644
index 00000000..93190713
--- /dev/null
+++ b/tests/test_sum_and_prod.spec.mjs
@@ -0,0 +1,139 @@
+import { test, expect } from '@playwright/test';
+import { cot, pi, sqrt, tan, cos, e} from 'mathjs';
+
+import { precision, loadPyodide, newSheet, parseLatexFloat } from './utility.mjs';
+
+let page;
+
+// loading pyodide takes a long time (especially in resource constrained CI environments)
+// load page once and use for all tests in this file
+test.beforeAll(async ({ browser }) => {page = await loadPyodide(browser, page);} );
+
+// give each test a blank sheet to start with (this doesn't reload pyodide)
+test.beforeEach(async () => newSheet(page));
+
+test('Test finite sum with no units', async () => {
+    await page.setLatex(0, String.raw`\sum_{n=0}^4\left(n\cdot2\right)=`);
+  
+    await page.waitForSelector('text=Updating...', {state: 'detached'});
+  
+    let content = await page.textContent('#result-value-0');
+    expect(parseLatexFloat(content)).toBeCloseTo(20, precision);
+    content = await page.textContent('#result-units-0');
+    expect(content).toBe('');
+  });
+
+  test('Test finite sum with units', async () => {
+    await page.setLatex(0, String.raw`\sum_{n=1}^3\left(n\cdot2\left\lbrack m\right\rbrack\right)=`);
+  
+    await page.waitForSelector('text=Updating...', {state: 'detached'});
+  
+    let content = await page.textContent('#result-value-0');
+    expect(parseLatexFloat(content)).toBeCloseTo(12, precision);
+    content = await page.textContent('#result-units-0');
+    expect(content).toBe('m');
+  });
+
+  test('Test infinte sum with factorial', async () => {
+    await page.setLatex(0, String.raw`\sum_{n=0}^{\infty}\left(\frac{2}{n!}\right)=`);
+  
+    await page.waitForSelector('text=Updating...', {state: 'detached'});
+  
+    let content = await page.textContent('#result-value-0');
+    expect(parseLatexFloat(content)).toBeCloseTo(2*e, precision);
+    content = await page.textContent('#result-units-0');
+    expect(content).toBe('');
+  });
+
+  test('Test sum over vector without units', async () => {
+    await page.setLatex(0, String.raw`\sum_{n=1}^{\mathrm{count}\left(B\right)}\left(B_{n,1}\right)=`);
+
+    await page.locator('#add-math-cell').click();
+    await page.setLatex(1, String.raw`B=\begin{bmatrix}1\\ 2\\ 3\end{bmatrix}`);
+  
+    await page.waitForSelector('text=Updating...', {state: 'detached'});
+  
+    let content = await page.textContent('#result-value-0');
+    expect(parseLatexFloat(content)).toBeCloseTo(6, precision);
+    content = await page.textContent('#result-units-0');
+    expect(content).toBe('');
+  });
+
+  test('Test sum over vector with units', async () => {
+    await page.setLatex(0, String.raw`\sum_{n=1}^{\mathrm{count}\left(B\right)}\left(B_{n,1}\right)=`);
+
+    await page.locator('#add-math-cell').click();
+    await page.setLatex(1, String.raw`B=\begin{bmatrix}1\\ 2\\ 3\end{bmatrix}\cdot1\left\lbrack m\right\rbrack=`);
+  
+    await page.waitForSelector('text=Updating...', {state: 'detached'});
+  
+    let content = await page.textContent('#result-value-0');
+    expect(parseLatexFloat(content)).toBeCloseTo(6, precision);
+    content = await page.textContent('#result-units-0');
+    expect(content).toBe('m');
+  });
+
+  test('Test sum over vector with inconsistent units', async () => {
+    await page.setLatex(0, String.raw`\sum_{n=1}^3\left(A_{n,1}\right)=`);
+
+    await page.locator('#add-math-cell').click();
+    await page.setLatex(1, String.raw`A=\begin{bmatrix}1\left\lbrack m\right\rbrack\\ 2\left\lbrack s\right\rbrack\\ 3\left\lbrack kg\right\rbrack\end{bmatrix}`);
+  
+    await page.waitForSelector('text=Updating...', {state: 'detached'});
+  
+    await expect(page.locator('#cell-0 >> text=Dimension Error')).toBeVisible();
+  });
+
+  test('Test finite sum with consistent limit units', async () => {
+    await page.setLatex(0, String.raw`\sum_{n=1\left\lbrack m\right\rbrack}^{3\left\lbrack m\right\rbrack}\left(n^2\cdot1\left\lbrack m\right\rbrack\right)=`);
+  
+    await page.waitForSelector('text=Updating...', {state: 'detached'});
+  
+    let content = await page.textContent('#result-value-0');
+    expect(parseLatexFloat(content)).toBeCloseTo(14, precision);
+    content = await page.textContent('#result-units-0');
+    expect(content).toBe('m^3');
+  });
+
+  test('Test finite sum with inconsistent limit units', async () => {
+    await page.setLatex(0, String.raw`\sum_{n=1\left\lbrack m\right\rbrack}^{3\left\lbrack s\right\rbrack}\left(n^2\cdot1\left\lbrack m\right\rbrack\right)=`);
+  
+    await page.waitForSelector('text=Updating...', {state: 'detached'});
+  
+    await expect(page.locator('#cell-0 >> text=Dimension Error')).toBeVisible();
+  });
+
+  test('Test sum over vector with limit units', async () => {
+    await page.setLatex(0, String.raw`\sum_{n=1\left\lbrack m\right\rbrack}^{3\left\lbrack m\right\rbrack}\left(A_{n,1}\right)=`);
+
+    await page.locator('#add-math-cell').click();
+    await page.setLatex(1, String.raw`A=\begin{bmatrix}1\\ 2\\ 3\end{bmatrix}`);
+  
+    await page.waitForSelector('text=Updating...', {state: 'detached'});
+  
+    await expect(page.locator('#cell-0 >> text=Dimension Error')).toBeVisible();
+  });
+
+  test('Test finite sum with dummy variable in exponent', async () => {
+    await page.setLatex(0, String.raw`\sum_{n=1\left\lbrack m\right\rbrack}^{3\left\lbrack m\right\rbrack}\left(2^{n}\right)=`);
+  
+    await page.waitForSelector('text=Updating...', {state: 'detached'});
+  
+    await expect(page.locator('#cell-0 >> text=Dimension Error')).toBeVisible();
+  });
+
+  test('Test nested sum', async () => {
+    await page.setLatex(0, String.raw`\sum_{i=1}^{\mathrm{count}\left(A\right)}\left(\sum_{j=1}^{\mathrm{count}\left(B\right)}\left(A_{i,1}\cdot B_{1,j}\right)\right)=`);
+
+    await page.locator('#add-math-cell').click();
+    await page.setLatex(1, String.raw`A=\begin{bmatrix}a\\ b\end{bmatrix}`);
+
+    await page.locator('#add-math-cell').click();
+    await page.setLatex(2, String.raw`B=\begin{bmatrix}c & d\end{bmatrix}`);
+  
+    await page.waitForSelector('text=Updating...', {state: 'detached'});
+  
+    let content = await page.textContent('#result-value-0');
+    expect(content).toBe(String.raw`a \cdot c + a \cdot d + b \cdot c + b \cdot d`);
+  });
+