| expression x | Returns the appropriate value if possible otherwise it returns the function with the simplified expression |
var r = nerdamer('coth(pi/2)');
console.log(r.toString());
var t = nerdamer('coth(x)')
console.log(t.toString());
var u = nerdamer('coth(pi/4)')
console.log(u.toString());
var v = nerdamer('coth(pi)')
console.log(v.toString());