Higher numbers are often called calculus. As the name implies, they mainly study derivatives, differentials, integrals, functions and approximate limits. Of course, there are many connections among them, and comparative study is the best, which is a very important content of postgraduate entrance examination. Moreover, in the future study, some professional courses of most majors, whether liberal arts or science and engineering, need to use the knowledge of functions, integrals and derivatives, such as financial accounting for accounting majors, western economics in international trade, and various mechanics (theories)

As for the specific teaching materials, generally look at the school. Colleges and universities can choose different versions of textbooks, and some professional teachers also have the right to choose their own textbooks. Moreover, there is the problem of version. For example, some schools have a lot of stocks of the previous edition of textbooks in their warehouses, so it may be possible for students to use the old edition of textbooks from the school's point of view. But these are basically unaffected, because the content is similar, and the teacher will explain it in the middle of the teaching.