Mathematics is the abstract study of topics such as quantity (numbers), structure, space, and change. There is a range of views among mathematicians and philosophers as to the exact scope and definition of mathematics. (wikipedia.com)
The subject is hated by many because it is complicated and not that easy to learn. So, here are some tips in memorizing mathematical formulas easily:
1. Relax. Math and Physics problems are not meant to be studied under stress. Relax your mind. By doing this, you will be able to focus more on your task.
2. Jot Down. During lecture, write down everything the professor writes down, and if he/she uses different colors of ink, do likewise. Even if you think you understand a problem, write down each step. You may find yourself confused later on and need those notes. (uic.edu)