JavaScript computer algebra system

Question

I am looking for a simple computer algebra system (cas) for JavaScript but I can't find anything with google. I only need basic functionality:

• simplify expressions to some canonic form. Ability to check if two expressions are the same, i.e., a(x+y) == ax+ay
• parse mathematical formulas. I want it to be able to read expressions like ax²+4x.
• solve simple equations etc.

Do you know of such a library?

Answer 1

(I'm answering myself, as the bounty failed to bring attention on this.)

You might want to try this CAS, which has some good functions (although some parts are broken, use the older versions).

Answer 2

You can try nerdamer

• simplification
• factoring
• expanding
• custom functions
• vectors
• matrices
• integration
• differentiation
• root solver
• interpolation

//Expanding
var result = nerdamer('a*(x+y)',null,'expand');
document.getElementById('text').innerHTML = '<p>'+result.text()+'</p>';
//Solving equation
var sol = nerdamer.solveEquations('0=x^2+x+a','x');
document.getElementById('text').innerHTML += '<p>'+sol.toString()+'</p>';

<script src="http://nerdamer.com/js/nerdamer.core.js"></script>
<script src="http://nerdamer.com/js/Algebra.js"></script>
<script src="http://nerdamer.com/js/Solve.js"></script>
<div id="text"></div>