Re: Integrals Here is a thread that discusses various ways for evaluating Gaussian integrals, http://www.nrich.maths.org/askedNRICH/edited/2171.html but the equations may not come across on your browser.
The indefinite integral cannot be expressed in simple form. Usually it is given in terms of a function called "erf", which is simply a standard form (constant=1/2) integral.