Restoring memory question

so, my math teacher always clears the memory before a test
is there any way that i can keep a program even after he clears the memory?
can i put something in the file or is there anyway to do it?

You can try archiving the program. Most teachers just clear the RAM leaving the archive along. If he's wise enough to clear it all, then short of writing your cheat sheet in assembly and compiling an app, you're out of luck.

Or, you know, you could always memorize the requisite formulae, eliminating the need to find some convoluted way of cheating on your tests.

Or perhaps he's a rising programmer in TI BASIC and wants to keep his programs without having to rewrite them all.
In which case, you may want to put them on your computer with a cable and TI Connect, but if you don't have a cable, then you may be out of luck. Try putting them into the archive, and talk to your teacher to make sure they understand your situation and (s)he doesn't delete all of your programs.
Most teachers will understand your point of view, and not every student is a cheater. *cough* *cough* Dngrsone *cough*