Engineering Mathematics in this class is to teach how to solve differential equations, which are models in many engineering problems. This post-calculus mathematics is needed and used by today's scientists and engineers. It will cover the following topics: (1) First order differential equations, (2) Second order differential equations, (3) Laplace transform, (4) Series solutions for differential equations , (5) Systems of differential equations, (6) Fourier series. 《keywords：工程數學, ☑️Engineering Mathematics, ☑️Variable Separable Method, ☑️Ordinary Differential Equations, ☑️Integrating factors & Linear ODEs, ☑️Higher degree ODEs, ☑️Method of Variation parameter, ☑️The Laplace Transform - Transformation Theorems, ☑️The Laplace Transform - Systems of Linear Diff. Eqs, ☑️Series Solutions3, ☑️Fourier Series》