When you go to college, learning methods are very important. It's really difficult for you to take the advanced math exam in college. According to my experience, first of all, you can have a general look at where you want to go before class. It doesn't take much time. You can think for yourself if you don't understand. It's important to listen carefully. There is nothing wrong with your notes, mainly to remember some important methods and conclusions. After class, you must choose to do some homework in the book and do as much as possible, which is relatively basic. You can find some practice materials and practice again. The chapters on differential and integral need more practice. The most difficult chapter is the limit chapter, which is also the difficulty in the postgraduate entrance examination. Thinking is the most important thing. University study is actually the training of thinking. I am a junior, and I hope some little experience will help you!