My dear student - my esteemed teacher. Hello everyone. The most important element that brings success to students in mathematics is "repetition". However, the most difficult thing we make students do in mathematics is "repeat". If the subject to be repeated is long and complex, the difficulty of this becomes even greater. When I prepared and presented this series for the first time in 2019, my aim was to show the student that the act of repeating is simpler and more doable. It was successful! Hundreds of thousands of students benefited greatly from the series - Function in 40 questions - Trigonometry - Derivative - Integral in 40 questions. Hundreds of my colleagues used the PDFs of this series to review the topics on the board with their students. That was exactly my aim. Teachers should not have difficulty finding content in their revision lessons and students should not be drowned in explanations for revision. I wanted the student to know what to do when he learns a subject and then looks back and realizes that he cannot "remember" some parts of the subject. “If you say something 40 times, it will happen!” I said. Now, we will talk about each topic 40 times in AYT Mathematics together with you. I hope everything goes well first! Don't forget! EXAM - EMPLOYEES WILL WIN!