Originally Posted by

**topsquark** Some limits at least. I suspect that the algorithms that generate the solutions are limited by what the programmer thinks the user might input. And the TI series (at least) occasionally can't exactly solve some moderately complex problems that are simple to do by hand if you know the correct method. (They *can*, however do a nice job numerically on just about anything.)

At the very least the TI series avoids any horrible functions such as the "polylog" function. (Mathematica used them to solve a differential equation for me once. I had a devil of a time looking up what they are and once I did I was left with no idea of what the solution meant.) The TIs can't handle anything nasty like that, but at least returns answers in terms of more common functions, or none at all.

-Dan