First: See if you have studied math well. Don't memorize mathematics, it needs to use every formula flexibly. To use the formula flexibly, you must be familiar with the formula and do more exercises.

Second: self-confidence will affect a person. The less confident he is, the more afraid he is about it. It's actually quite simple, but it's hard to miss him. I always feel I can't do it well, so I really can't do it well. When I have nothing to do, I will give myself a hint: I can do high speed and I will learn well. It is very important to build self-confidence. It's not that difficult to do anything with confidence. This is the role of faith. You can try.

It's not too late for you to work hard!