Do more exercises, the answer may not be right at first, but you should seriously think about how to solve the problem until all possible ideas are thought out, until you can't figure it out (or the more you think about it, the more confused you are), and then you will be impressed and the next question will be much easier. Until you can work it out without looking at the answers, do many questions at once (a whole class/or a complete exercise /20 /30 questions, etc. ), and then look at the answer, carefully look at what you did wrong (you will know how careless you often do wrong), so that you will be fascinated by torturing him enough.
Of course, the premise is that you already know what each symbol of mathematics stands for. If you don't know, just look through the textbooks and ask someone.