| expression x | Returns the appropriate value if possible otherwise it returns the function with the simplified expression |
var x = nerdamer('expand((x^2+1)^2/4)');
console.log(x.toString());
var y = nerdamer('expand(x*(x+1))');
console.log(y.toString());
x = nerdamer('(x+y)*(x-5)*x').expand();
console.log(x.toString());