First of all, you need to overcome your fear of mathematics, and don't think that you used to be particularly bad at mathematics, so you can't learn well in college. I didn't do well in math in the college entrance examination, and the college advanced math is not that bad. So don't have too much psychological pressure.

Secondly, a high school math test paper has many knowledge points and is carefully examined. Higher mathematics in universities pays more attention to thinking. Still need to practice doing more questions. There are many fixed formulas, just remember and use them flexibly.

So don't think you can't learn before, and you won't learn again. Have confidence in yourself.