Hidden Quadratics

I have work so I can't talk right now, and I'm very  very distracted. Which is incredibly bad, but Calculus is just soooo evil and stuff.
In order to get myself not to get distracted here, you can have the product of my previous distraction. (Because that will render me unable to use Blogger for the rest of the day)

Click to enlarge

Hidden Quadratic equations. They're the velociraptors of Maths. Learn to spot them before it's too late.