11:35

Linear, first-order differential equations

29:22

How to solve 2nd order differential equations

36:30

What is a power series?

45:50

Integrals of trig functions and reduction formulae

27:22

How to solve linear differential equations

41:00

How to solve second order differential equations

41:26

What is a Taylor polynomial?

43:40

Second-order differential equations: how to solve.