"Formulas for the mind" is a book written by the outstanding author Florentin Smarandake, in which interesting and unusual mathematical formulas are collected and systematized. The author tries to prove that mathematics is not only complicated equations and theorems, but also a game with the mind that can inspire new thoughts and discoveries. The book will be a useful guide for those interested in mathematics, philosophy and creative thinking. "Formulas for the mind" will not only expand your knowledge, but also complete your vision of the world around you.