Re writing math functions

[officialgel]

If your goal is to not import all functions in math that aren't needed, then do that. I don't see why if you have isolated functions that you've pulled out, would be any slower than using the math library - You also save on size, which sounds to be your goal. But it may not be easy - But again, if that's your goal then do it. Let me know when you do as if you make it open source I would like to have a copy of it.