First of all, the learning method of advanced mathematics is different from that of elementary mathematics. Technically, it's mathematical analysis. You see, the university textbook Mathematical Analysis (Tongji Edition) is exactly the same as Advanced Mathematics, and 90% of the contents are the same!

Secondly, the essence of Shu Gao lies not in its application, but in its mathematical thought NB. Application is a small part of it, and the most important thing you have is the derivation of formulas. Only by knowing why can we get twice the result with half the effort. It can't be solved by memorizing a few formulas and doing a few problems! I have been in college for four years, and I am still studying at work. I just read a book, Advanced Mathematics (Tongji 5th Edition), and every time I read it, I find something new! Of course, learning lies in application, but if you just do a few questions and wait for the first half of the year, it is easy to forget!

Finally, in fact, most people in Shu Gaoda are self-taught, because the knowledge you listen to in class is very limited, so don't worry, you are fully capable of learning it well!

Higher Mathematics (Tongji Sixth Edition) Higher Education Press is enough!