diff --git a/.vscode/launch.json b/.vscode/launch.json
new file mode 100644
index 00000000..17173d6f
--- /dev/null
+++ b/.vscode/launch.json
@@ -0,0 +1,15 @@
+{
+    // Utilisez IntelliSense pour en savoir plus sur les attributs possibles.
+    // Pointez pour afficher la description des attributs existants.
+    // Pour plus d'informations, visitez : https://go.microsoft.com/fwlink/?linkid=830387
+    "version": "0.2.0",
+    "configurations": [
+        {
+            "type": "pwa-chrome",
+            "request": "launch",
+            "name": "Launch Chrome against localhost",
+            "url": "http://localhost:8080",
+            "webRoot": "${workspaceFolder}"
+        }
+    ]
+}
\ No newline at end of file
diff --git a/index.js b/index.js
index ce11df3f..90bcdee6 100644
--- a/index.js
+++ b/index.js
@@ -2,10 +2,18 @@ const ChangeTypes = require('./lib/ChangeTypes');
 const factor = require('./lib/factor');
 const simplifyExpression = require('./lib/simplifyExpression');
 const solveEquation = require('./lib/solveEquation');
+const printMS = require('./lib/util/print');
+const Node = require('./lib/node');
+const Negative = require('./lib/Negative')
+const flatten = require('./lib/util/flattenOperands');
 
 module.exports = {
   factor,
   simplifyExpression,
   solveEquation,
+  Node,
+  Negative,
+  printMS,
+  flatten,
   ChangeTypes,
 };
diff --git a/lib/node/Creator.js b/lib/node/Creator.js
index 19f07d23..a2d430a4 100644
--- a/lib/node/Creator.js
+++ b/lib/node/Creator.js
@@ -11,16 +11,16 @@ const NodeCreator = {
   operator (op, args, implicit=false) {
     switch (op) {
     case '+':
-      return new math.expression.node.OperatorNode('+', 'add', args);
+      return new math.OperatorNode('+', 'add', args);
     case '-':
-      return new math.expression.node.OperatorNode('-', 'subtract', args);
+      return new math.OperatorNode('-', 'subtract', args);
     case '/':
-      return new math.expression.node.OperatorNode('/', 'divide', args);
+      return new math.OperatorNode('/', 'divide', args);
     case '*':
-      return new math.expression.node.OperatorNode(
+      return new math.OperatorNode(
         '*', 'multiply', args, implicit);
     case '^':
-      return new math.expression.node.OperatorNode('^', 'pow', args);
+      return new math.OperatorNode('^', 'pow', args);
     default:
       throw Error('Unsupported operation: ' + op);
     }
@@ -29,24 +29,24 @@ const NodeCreator = {
   // In almost all cases, use Negative.negate (with naive = true) to add a
   // unary minus to your node, rather than calling this constructor directly
   unaryMinus (content) {
-    return new math.expression.node.OperatorNode(
+    return new math.OperatorNode(
       '-', 'unaryMinus', [content]);
   },
 
   constant (val) {
-    return new math.expression.node.ConstantNode(val);
+    return new math.ConstantNode(val);
   },
 
   symbol (name) {
-    return new math.expression.node.SymbolNode(name);
+    return new math.SymbolNode(name);
   },
 
   parenthesis (content) {
-    return new math.expression.node.ParenthesisNode(content);
+    return new math.ParenthesisNode(content);
   },
 
   list (content) {
-    return new math.expression.node.ArrayNode(content);
+    return new math.ArrayNode(content);
   },
 
   // exponent might be null, which means there's no exponent node.
@@ -78,7 +78,7 @@ const NodeCreator = {
   // Given a root value and a radicand (what is under the radical)
   nthRoot (radicandNode, rootNode) {
     const symbol = NodeCreator.symbol('nthRoot');
-    return new math.expression.node.FunctionNode(symbol, [radicandNode, rootNode]);
+    return new math.FunctionNode(symbol, [radicandNode, rootNode]);
   }
 };
 
diff --git a/lib/simplifyExpression/distributeSearch/index.js b/lib/simplifyExpression/distributeSearch/index.js
index b02d2dd6..284dffaf 100644
--- a/lib/simplifyExpression/distributeSearch/index.js
+++ b/lib/simplifyExpression/distributeSearch/index.js
@@ -53,7 +53,7 @@ function expandBase (node) {
     return Node.Status.noChange(node);
   }
 
-  if (!Node.Type.isFunction(base, 'nthRoot') && !Node.Type.isOperator(base, '+')) {
+  if (!Node.Type.isFunction(base, 'nthRoot') && !(Node.Type.isOperator(base, '+') || Node.Type.isOperator(base, '*') || Node.Type.isOperator(base, '/'))) {
     return Node.Status.noChange(node);
   }
 
@@ -61,11 +61,50 @@ function expandBase (node) {
   const expandedBase = Node.Type.isFunction(base, 'nthRoot')
         ? base
         : node.args[0];
+  let expandedNode
+  const substeps = [];
+  let status;
 
-  const expandedNode = Node.Creator.operator('*', Array(parseFloat(exponent.value)).fill(expandedBase));
 
-  return Node.Status.nodeChanged(
-    ChangeTypes.EXPAND_EXPONENT, node, expandedNode, false);
+  if (Node.Type.isFunction(base, 'nthRoot')) {
+    expandedNode = Node.Creator.operator('*', Array(parseFloat(exponent.value)).fill(expandedBase));
+    return Node.Status.nodeChanged(
+      ChangeTypes.EXPAND_EXPONENT, node, expandedNode, false);
+  } else if (Node.Type.isOperator(base, '+')) {
+    // fpiou (modification du code pour permettre le développement (a+b)^2 = a^2+2*a*b+b^2))
+    acarre = Node.Creator.operator('^',[base.args[0],exponent])
+    bcarre = Node.Creator.operator('^',[base.args[1],exponent]) 
+    doubleproduit = Node.Creator.operator('*',[ Node.Creator.constant(2),Node.Creator.operator('*',base.args)])
+    expandedNode = Node.Creator.operator('+',[acarre,doubleproduit,bcarre])
+    status = Node.Status.nodeChanged(
+      ChangeTypes.EXPAND_EXPONENT, node, expandedNode, false)
+    substeps.push(status);
+    newNode = Node.Status.resetChangeGroups(status.newNode);
+    const childStatus = simplify(newNode);
+    if (childStatus.hasChanged()) {
+      status = Node.Status.childChanged(newNode, childStatus);
+      substeps.push(status);
+      newNode = Node.Status.resetChangeGroups(status.newNode);
+    }
+    if (substeps.length === 1) {
+      return substeps[0];
+    }
+    return Node.Status.nodeChanged(
+      ChangeTypes.DISTRIBUTE, node, newNode, false, substeps);
+  } else if (Node.Type.isOperator(base, '*')) {
+    // fpiou (modification du code pour permettre le "développement" (a*b)^2 = a^2*b^2))
+    for (let i=0;i<base.args.length;i++) {
+      base.args[i] = Node.Creator.operator('^',[base.args[i],exponent])
+    }
+    return Node.Status.nodeChanged(
+      ChangeTypes.EXPAND_EXPONENT, node, base, false);
+  } else if (Node.Type.isOperator(base, '/')) {
+    for (let i=0;i<2;i++) {
+      base.args[i] = Node.Creator.operator('^',[base.args[i],exponent])
+    }
+    return Node.Status.nodeChanged(
+      ChangeTypes.EXPAND_EXPONENT, node, base, false);
+  }
 }
 
 // Distributes unary minus into a parenthesis node.
@@ -297,6 +336,7 @@ function simplify(node) {
     rearrangeCoefficient,  // e.g. x*5 -> 5x
     collectAndCombineSearch,                        // e.g 2x*4x -> 8x^2
     distributeAndSimplifyMultiplication, // e.g. (2+x)(3+x) -> 2*(3+x) recurses
+    expandBase
   ];
 
   let newNode = node.cloneDeep();
diff --git a/lib/solveEquation/index.js b/lib/solveEquation/index.js
index c990bcd8..c2c45592 100644
--- a/lib/solveEquation/index.js
+++ b/lib/solveEquation/index.js
@@ -3,6 +3,7 @@ const math = require('mathjs');
 const stepThrough = require('./stepThrough');
 
 function solveEquationString(equationString, debug=false) {
+	console.log('solveEquationString', equationString);
   const comparators = ['<=', '>=', '=', '<', '>'];
 
   for (let i = 0; i < comparators.length; i++) {
diff --git a/lib/solveEquation/stepThrough.js b/lib/solveEquation/stepThrough.js
index 64380c72..185c57d6 100644
--- a/lib/solveEquation/stepThrough.js
+++ b/lib/solveEquation/stepThrough.js
@@ -68,8 +68,11 @@ function stepThrough(leftNode, rightNode, comparator, debug=false) {
 
   // Step through the math equation until nothing changes
   do {
+	  console.log('steps', steps);
     steps = addSimplificationSteps(steps, equation, debug);
 
+
+	  console.log('last new ascii', steps[steps.length - 1]?.newEquation?.ascii());
     if (steps.length > 0) {
       const lastStep = steps[steps.length - 1];
       equation = Equation.createEquationFromString(
diff --git a/lib/util/evaluate.js b/lib/util/evaluate.js
index 53d79728..11604150 100644
--- a/lib/util/evaluate.js
+++ b/lib/util/evaluate.js
@@ -4,7 +4,7 @@
 
 function evaluate(node) {
   // TODO: once we swap in math-parser, call its evaluate function instead
-  return node.eval();
+  return node.evaluate();
 }
 
 module.exports = evaluate;
diff --git a/package-lock.json b/package-lock.json
index 05cb853a..7497ab31 100644
--- a/package-lock.json
+++ b/package-lock.json
@@ -1,9 +1,2476 @@
 {
   "name": "mathsteps",
   "version": "0.2.0",
-  "lockfileVersion": 1,
+  "lockfileVersion": 2,
   "requires": true,
+  "packages": {
+    "": {
+      "version": "0.2.0",
+      "license": "Apache-2.0",
+      "dependencies": {
+        "mathjs": "^10.0.2"
+      },
+      "devDependencies": {
+        "eslint": "^3.10.2",
+        "eslint-config-google": "^0.7.0",
+        "eslint-plugin-sort-requires": "^2.1.0",
+        "mocha": "^9.1.3"
+      },
+      "engines": {
+        "node": ">=6.0.0"
+      }
+    },
+    "node_modules/@babel/runtime": {
+      "version": "7.16.7",
+      "resolved": "https://registry.npmjs.org/@babel/runtime/-/runtime-7.16.7.tgz",
+      "integrity": "sha512-9E9FJowqAsytyOY6LG+1KuueckRL+aQW+mKvXRXnuFGyRAyepJPmEo9vgMfXUA6O9u3IeEdv9MAkppFcaQwogQ==",
+      "dependencies": {
+        "regenerator-runtime": "^0.13.4"
+      },
+      "engines": {
+        "node": ">=6.9.0"
+      }
+    },
+    "node_modules/@ungap/promise-all-settled": {
+      "version": "1.1.2",
+      "resolved": "https://registry.npmjs.org/@ungap/promise-all-settled/-/promise-all-settled-1.1.2.tgz",
+      "integrity": "sha512-sL/cEvJWAnClXw0wHk85/2L0G6Sj8UB0Ctc1TEMbKSsmpRosqhwj9gWgFRZSrBr2f9tiXISwNhCPmlfqUqyb9Q==",
+      "dev": true
+    },
+    "node_modules/acorn": {
+      "version": "5.1.2",
+      "resolved": "https://registry.npmjs.org/acorn/-/acorn-5.1.2.tgz",
+      "integrity": "sha512-o96FZLJBPY1lvTuJylGA9Bk3t/GKPPJG8H0ydQQl01crzwJgspa4AEIq/pVTXigmK0PHVQhiAtn8WMBLL9D2WA==",
+      "dev": true,
+      "bin": {
+        "acorn": "bin/acorn"
+      },
+      "engines": {
+        "node": ">=0.4.0"
+      }
+    },
+    "node_modules/acorn-jsx": {
+      "version": "3.0.1",
+      "resolved": "https://registry.npmjs.org/acorn-jsx/-/acorn-jsx-3.0.1.tgz",
+      "integrity": "sha1-r9+UiPsezvyDSPb7IvRk4ypYs2s=",
+      "dev": true,
+      "dependencies": {
+        "acorn": "3.3.0"
+      }
+    },
+    "node_modules/acorn-jsx/node_modules/acorn": {
+      "version": "3.3.0",
+      "resolved": "https://registry.npmjs.org/acorn/-/acorn-3.3.0.tgz",
+      "integrity": "sha1-ReN/s56No/JbruP/U2niu18iAXo=",
+      "dev": true,
+      "bin": {
+        "acorn": "bin/acorn"
+      },
+      "engines": {
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+      }
+    },
+    "node_modules/ajv": {
+      "version": "4.11.8",
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+      "integrity": "sha1-gv+wKynmYq5TvcIK8VlHcGc5xTY=",
+      "dev": true,
+      "dependencies": {
+        "co": "4.6.0",
+        "json-stable-stringify": "1.0.1"
+      }
+    },
+    "node_modules/ajv-keywords": {
+      "version": "1.5.1",
+      "resolved": "https://registry.npmjs.org/ajv-keywords/-/ajv-keywords-1.5.1.tgz",
+      "integrity": "sha1-MU3QpLM2j609/NxU7eYXG4htrzw=",
+      "dev": true
+    },
+    "node_modules/ansi-colors": {
+      "version": "4.1.1",
+      "resolved": "https://registry.npmjs.org/ansi-colors/-/ansi-colors-4.1.1.tgz",
+      "integrity": "sha512-JoX0apGbHaUJBNl6yF+p6JAFYZ666/hhCGKN5t9QFjbJQKUU/g8MNbFDbvfrgKXvI1QpZplPOnwIo99lX/AAmA==",
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+        "picomatch": "^2.0.4"
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+        "esutils": "2.0.2",
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+        "node": ">=10"
+      },
+      "funding": {
+        "url": "https://github.com/sponsors/sindresorhus"
+      }
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+        "escape-string-regexp": "1.0.5",
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+      "dev": true,
+      "dependencies": {
+        "anymatch": "~3.1.2",
+        "braces": "~3.0.2",
+        "fsevents": "~2.3.2",
+        "glob-parent": "~5.1.2",
+        "is-binary-path": "~2.1.0",
+        "is-glob": "~4.0.1",
+        "normalize-path": "~3.0.0",
+        "readdirp": "~3.6.0"
+      },
+      "engines": {
+        "node": ">= 8.10.0"
+      },
+      "optionalDependencies": {
+        "fsevents": "~2.3.2"
+      }
+    },
+    "node_modules/circular-json": {
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diff --git a/package.json b/package.json
index 60103bd6..466f0dff 100644
--- a/package.json
+++ b/package.json
@@ -4,16 +4,17 @@
   "description": "Step by step math solutions",
   "main": "index.js",
   "dependencies": {
-    "mathjs": "3.11.2"
+    "mathjs": "^10.0.2",
+    "mathsteps": "github:fpiou/mathsteps"
   },
   "engines": {
     "node": ">=6.0.0"
   },
   "devDependencies": {
-    "eslint": "^3.10.2",
-    "eslint-config-google": "^0.7.0",
+    "eslint": "^3.19.0",
+    "eslint-config-google": "^0.7.1",
     "eslint-plugin-sort-requires": "^2.1.0",
-    "mocha": "2.4.5"
+    "mocha": "^9.2.0"
   },
   "scripts": {
     "lint": "node_modules/.bin/eslint .",
@@ -39,4 +40,4 @@
     "url": "https://github.com/socraticorg/mathsteps/issues"
   },
   "homepage": "https://github.com/socraticorg/mathsteps#readme"
-}
+}
\ No newline at end of file
diff --git a/pnpm-lock.yaml b/pnpm-lock.yaml
new file mode 100644
index 00000000..732e2315
--- /dev/null
+++ b/pnpm-lock.yaml
@@ -0,0 +1,1490 @@
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