Use of different methods to find antiderivatives

Description
Advance guessing method to find antiderivatives is explained in this video tutorial. Few problems of differential equations are solved by substitution and by separation of variables. method. The use of annihilation operator in quantum mechanics is explained.
Prof. Haynes Miller, Maths,18.01 Single Variable Calculus, Fall 2006: 15. Differential Equations, Massachusetts Institute of Technology: MIT OpenCourseWare),http://ocw.mit.edu (Accessed July,9,2011). License: Creative Commons BY-NC-SA:http://ocw.mit.edu/terms/#cc