Me too, got me through my ME degree. Made the mistake of purchasing an HP product for my college bound high-schooler. Total mistake. NO advanced high school math programs facilitate the use of RPN to crunch down a complex expression to get to the final numerical answer. The TI n-spire CX or CX CAS models are more or less strictly required to the exception of all other manufacturer’s product, even though the math teacher is obliged to claim otherwise. It turns out the TI is all the teacher himself or herself has ever used. It’s a shame because RPN is so logical and natural, vastly cutting down on time spent computing the final answer, and really limiting opportunities for error. But you can’t fight the rising tide I guess.
Guess I do not understand, what does a “math program” have to do with how you use a calculator to solve an equation or calculate something?