How it all began - Jaz-Z

I came up with this idea when I thought of the following Mathematical Song, which then grew to Mathematical Songs I on Sporcle. So, as I enjoy making them and they seem popular on Sporcle, I decided to make a blog and add songs every few days. So here's the first one I ever made. In case you don't get it yet, the idea is to guess the song from the Mathematical Expression: