Calculator program

I primarily made this program in order to have function that converts a mathematical text string into a number.

ShadowTurtle have posted a similar function, but this one contains the trigonometry functions, logarithm functions, variables and function functions.

I'm trying to make € with it (see the source file), but I'm not shure if anyone would pay for it, well, time will show.

>>I primarily made this program<<

did you probably miss to post an url?

Oh, forgot to say, as always, on my page (at least the new one).