微積分:
1.Thomas - Thomas' Calculus
2.Larson - Calculus With Analytic Geometry
3.Salas - Calculus: One and Several Variables

如果要看微方,以下2本是較簡單的
1.Boyce - Elementary Differential Equations and Boundary Value Problems
2.Ross - Introduction to Ordinary Differential Equations

如果要看複變,以下這本也是較簡單的
1.Churchill & Brown - Complex Variables and Applications