I am also a college student, and now I have graduated from college. The first chapter to the tenth chapter is the key point, so we should focus on it, do more exercises and examples after class. Several laws and theorems don't need your deep understanding, you can use them flexibly. It's not as complicated as you think. As long as you do the after-school exercises in chapters 1 to 10 carefully, I guarantee that you will be absolutely fine. Read more examples in each chapter, and you'd better go to the bookstore to find some test questions to practice. As long as you are serious, you will definitely have no problem going through customs. There are many problems with the concept of high number, such as a formula, which you don't need to understand deeply. Just use it. Advanced mathematics is not as difficult as college entrance examination mathematics. I believe that as long as you try your best to do as I say. I am sure to succeed. Finally, I wish you good grades in the exam. You'd better give it to me, hehe