@EllisDee the only thing stopping you from doing that back then it's nobody had made an app yet
I taught myself TI BASIC on that thing and spent the whole lecture writing a program to do the equation we were learning that day. Then for the problems in class I'd just put in the values for A and B and it'd just spit out the answer. It was great. For the first time ever I actually enjoyed math. Homework only took like a minute too. Could easily be done in the timeframe of class starting until homework was collected if need be.