Arian Heidari (YouTuber, mathematics teacher and content creator) was born in 1363, has an MBA from Sharif University and is one of the most famous mathematics teachers in the entrance exam, especially in experimental mathematics. Arian Heydari's classrooms are usually very enthusiastic. In other words, he can be considered the inventor of a new way of teaching mathematics. It usually solves questions using simple solutions and tests, which is very attractive to students. However, the solution method that Arian presents in his classes may not be able to answer some questions. Therefore, it is better to pay attention to the concepts he presents in addition to his unique methods in his classes.