Personally I really struggle with the syntax and notation of upper-level math courses, I need a big cheat sheet of all the terms. It's like programming where we use i, j, k for loop variables instead of something more descriptive. My brain has to do one extra layer of translation between what's written and the concept being taught and then I lose focus, but intuitively I've always been fine with math concepts. When I took linear algebra in college (and did terrible) I particularly struggled with all the syntax that was introduced. Would love some tips if anyone else has a similar problem.