Compared with high school mathematics, advanced mathematics is narrower, deeper and more abstract. It is a general theory to solve problems and involves the study of microscopic things. The concept of advanced mathematics is often difficult to understand, especially the most basic concept-limit, which is defined by ε -δ language. On this basis, there are more complex concepts such as derivative, integral, series and differential equation. The exam will be easier. This is an exam that will focus on the application of basic concepts and the ability to solve problems, rather than simply memorizing and operating.