Changing the way we change the variables:Refresher notes in real analysis

The book guides the reader through a series of worked examples in integral calculus and ordinary differential equations. It is aimed to enhance the skill of manipulating analytic expressions and casting them in suitable forms. Selection of techniques helps to develop a specific style in dealing with analytical problems and leaves room for personal preference in choosing a particular method. The book will be useful for students doing a course in calculus or differential equations and for those who want to refresh their knowledge in this field.