yes probably something of value considering it is 38 years old and still works.
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Unfourtunately, it is not possible to expand with the TI-84. Only the TI-89 can expand polynomials.
You can download it from TI's website.
Texas Instruments TI-30xIIS calculator?
None have been made yet, due to the severe programming limitations put in place by TI. User input is minimally available, and programs cannot draw anything. Post by Hagefade: There is now: http://www.ticalc.org/pub/nspire/basic/games/ enjoy!
http://www2.ohlone.edu/people2/joconnell/ti/simplex8384.pdf