Generally, mathematical words may be vague in concept and not quick enough in thinking. You can buy Lightweight Winning, which will have more detailed examples, concepts and key points, and exercises.

You don't have to do too many questions in English. You can buy any kind of paper or practice writing (but you must deduct the teaching materials). It's important to read more books.

If the basic knowledge of Chinese is poor, focus on the basic knowledge, review more and recite more. If your reading ability is poor, you can buy 300 classics of modern Chinese reading. If it is a composition, read more books.