Do you mean TI-89? If so, it can perform operations including variables right out of the box. It performs differentiation and integration. It has a bunch of features involving matrices that i haven't really used. It can do waaaaay more than I've ever known.Thanks for the replies, mainly i will be using it for graphing, also a bit of stats aswell probably, I also do a lot of calculus on my course, don't know if the casio can do any calculus, what level of calculus does the TI 98 go upto? The amount of it i have to learn at the moment seems endless, also the texas instuments seem to be harder to find in the UK.
Do you mean TI-89?
I later stepped up to a TI98 for its calculus-related functions...