1, Calculus: Calculus is a branch of mathematics that studies changes and solves concepts and methods such as limit, derivative and integral. Including function and limit, derivative and differential, indefinite integral and definite integral.

2. Linear algebra: Linear algebra is the field of studying vector space and its linear transformation and solving equations. Including vector space and its operation rules, linear transformation, eigenvalues and eigenvectors, determinants and matrices.

3. Probability theory and statistics: Probability theory is a theory to study the possibility of random events; Statistics focuses on how to collect data and draw conclusions from it.