The Table of Integrals, Series, and Products is the essential reference for integrals in the English language. Mathematicians, scientists, and engineers, rely on it when identifying and subsequently solving extremely complex problems. Since publication of the first English-language edition in 1965, it has been thoroughly revised and enlarged on a regular basis, with substantial additions and, where necessary, existing entries corrected or revised. The seventh edition includes a fully searchable CD-Rom. - Fully searchable CD that puts information at your fingertips included with text - Most up to date listing of integrals, series and products - Provides accuracy and efficiency in work
It is worth noting that the latest edition now INCLUDES a fully-searchable CD-ROM version of the book. It is amazing how many practical functions actually have closed-form integrals. You will still need to transform a lot of things, but that's just one of the humdrum parts of your job that needs done.
Gradshteyn and Ryzhik is the authoritative mathematical table book. If you want to get a grasp on how special functions relate to each other, and analytic approximations to understand systems, this is a great resource.