Gosh, I guess I need Sammy Winchester to translate this vid to me into something easier.
Click to view
And that's only Part 1 of 8.
EDIT: I should say it in the first place. I just wanted to share my headache after I watched this vid. My friend gave me the link. He thought I'm a great fan of arithmetic! Did my face show the vibe that I'm a math lover? Wooh!!!