A step by step solver for math

https://www.youtube.com/watch?v=iCrargw1rrM

Requirements

Mathsteps requires Node version > 6.0.0

Usage

To install mathsteps using npm:

npm install mathsteps

const mathsteps = require("mathsteps");

const steps = mathsteps.simplifyExpression("2x + 2x + x + x");

steps.forEach((step) => {
   console.log("before change: " + step.oldNode.toString()); // before change: 2 x + 2 x + x + x
   console.log("change: " + step.changeType); // change: ADD_POLYNOMIAL_TERMS
   console.log("after change: " + step.newNode.toString()); // after change: 6 x
   console.log("# of substeps: " + step.substeps.length); // # of substeps: 3
});

To solve an equation:

const steps = mathsteps.solveEquation("2x + 3x = 35");

steps.forEach((step) => {
   console.log("before change: " + step.oldEquation.ascii()); // e.g. before change: 2x + 3x = 35
   console.log("change: " + step.changeType); // e.g. change: SIMPLIFY_LEFT_SIDE
   console.log("after change: " + step.newEquation.ascii()); // e.g. after change: 5x = 35
   console.log("# of substeps: " + step.substeps.length); // e.g. # of substeps: 2
});

(if you're using mathsteps v0.1.6 or lower, use .print() instead of .ascii())

To see all the change types:

const changes = mathsteps.ChangeTypes;

Contributing

Hi! If you're interested in working on this, that would be super awesome! Learn more here: CONTRIBUTING.md.

Build

First clone the project from github:

git clone https://github.com/google/mathsteps.git
cd mathsteps

Install the project dependencies:

npm install

Test

To execute tests for the library, install the project dependencies once:

npm install

Then, the tests can be executed:

npm test