* * * There are five books (Grade One, Grade Two and Grade Three 1). The five books seem to be many, but the contents are easy to understand and suitable for self-study. It is best to cooperate with simple counseling materials.
I suggest you focus on learning derivatives and limits when you teach yourself, because the advanced mathematics in college is mainly about calculus, which has a lot to do with them. As for other advanced mathematics, it is good to see if you can understand it.
I suggest you read Advanced Mathematics-Tongji University Fifth Edition. Looking at this now, I feel very good and detailed. There are two books, chapter 12.
In addition, I also have a teaching video of advanced mathematics in college. Please leave a message if you like.