Or you could even view this as two different functions. You could view this one up here as u of x. So you could say this is the same thing. This is the same thing as u of x over, you could view the one in the denominator as v of x. So that one right there is v of x. And so if you're taking the derivative of something that can be expressed in this way as the quotient of two different functions, well then you could use the quotient rule. And I'll give you my little aside, like I always do, the quotient rule, if you ever forget it, it can be derived from the product rule.