Calculus, the branch of mathematics where the only thing more infinite than infinity is the number of ways you can do it wrong.
Learn how to correctly apply the principles of calculus to... not.
Or, you know, just wing it. We won't judge.
Learn about Limits, the ultimate cop-out.
Discover the Derivative of Sarcasm, where the chain rule is optional.
Read about the Proof of Incorrectness, where the more you prove, the less you know.