I don't want the most sophisticated and complex answer. What I want, is a an easy to understand, broken down answer. In plain language, not just...

I don't want the most sophisticated and complex answer. What I want, is a an easy to understand, broken down answer. In plain language, not just symbols. Please approach this as you would if you were talking to someone who had a very low level grasp of the subject. My goal is to actually understand the subject, and up to now, I do not. Thank you.