converting a string into a mathematical expression

Was wondering if anyone has made code that converts a string that represents an expression into the actual expression which can take values and give results. If not, I'm currently working on one but I just want to make sure I'm not wasting my time here..

[edit] never mind..... I've come to the conclusion that this would be rather useless...

It's definitely been done before. Daelin or Vexorian i think did it. Can't remember which. It might be back when Daelin did his JASS teaching lessons. Gosh that's a long time ago.

I just realized tho, that in most cases with jass, you can just paste your expression right into the text just as you'd do into a wordpad document, so it really doesn't make anything any easier for me. maybe a little bit for integration purposes....but not much else as far asi can think of.