I attended school in Ghana and completed my 5-year college and majored in mathematics. In the US, I attended MCC college and majored in mathematics. In the first place, math is a simple logic which needs to be approached methodically. There is no need chewing formulas in your head to solve math problems. By step-by-step methods, one should be able to come up with his or her own formulas. You should thoroughly understand how to write your own formulas consistent with any general accep.