Alchemy is a Science

With the war closing in Dumbledore seeks help from a different country, Amestris. Mustang, now Furhur sends Edward to teach these "ignorant baboons" about Alchemy and the law of equivalent exchange. Obviously the Golden Trio wants in on the new professors secrets and learn Alchemy. Will they be beaten at their own game, by a Slytherin no less? The oc is not important, slight au.