solve derivatives and integrals symbolically similar to the functions of the TI-89? I've been trying to find one that isn't a graphing calculator in particular.
You will need to read the regulations more carefully, if graphing calculators are prohibited then CAS calculators will be even more prohibited.
The HP28C might meet your requirement if you can find one (it does graph, but the screen height is so small mey-be no one will notice)
CB