After a few years of experience in solving various problems of integration and dialogue with different students, I realized that their main problem in solving problems of integration, lack of control over basic topics in mathematics. Therefore at the time of writing this book this discussion was my priority and wrote a different book. In fact by reading this book, in addition to integration, you will be familiarized with many other basic topics of mathematics, such as trigonometry, logarithm and exponential functions, absolute value function, the laws of exponents and radicals,...