I can add helpful programs/notes into a calculator, right?

For the Math I/Math II SATs. The rules only state that calculators cannot be used for “sharing or exchanging, or removing part of a test book or any notes from the test from the test room,” and that you also “do not have to clear your calculator’s memory before or after taking the test.” So as long as I don’t share questions/answers from the test itself, I can program whatever I want into my calculator’s memory, right?

According to your information, yes you can. Have you checked if it complies with other rules, it will help if you do.

@GMKoon I haven’t seen anything else pertaining to the calculator policies and programs/notes stored in calculators.

Here is a link for reference:
https://sat.collegeboard.org/practice/sat-subject-test-preparation/mathematics-level-2

Further info on calculator policy, again, nothing addressing storing equations/programs into the calculator
https://sat.collegeboard.org/register/calculator-policy