I am looking for a way to type a math expression into a string parameter, then evaluate it in the function. Specifically I am working on writing a Monte Carlo numerical integrator for a project I am doing that needs some integrals, but I am wanting to be able to use it for any expression. I want to be able to pass it the expression and bounds to evaluate, but I am unsure of how to actually make it evaluate the string as anything but. The old chrsraw() expression function did what I needed it to on an old project, but I am aiming to do this purely with VEX.

This will eventually turn into a random variable node with more control over the distributions, but I need the gamma function for several of them, which requires an integral calculation, as do several others.

edit: I meant vex.