احسان غیاثی | ریاضی کنکور

🌏 Engineer Ehsan Ghiathi |•🌎 ✔Mechanical engineer ✔Experimental mathematics and calculations teacher ✔Classino, Titan, and Zitaz teacher ✔Flight instructor to major cities of the country ✔Teacher of two-digit and three-digit entrance exams ✔Member of the authors and editors of entrance exam books (IQ, Hercules, etc.)