You're taking cosine of x. Cosine of x to the third power. This is a composite function. You could view this, you could view this as the function, let's call this blue one the function v, and let's call this the function u, and so if we're taking x and into u, this is u of x, and then if we're taking u of x into the input, or as the input into the function v, then this output right over here, this is going to be v of, well, what was inputted? V of u of x. V of u of x. Or, another way of writing it, I'm going to write it multiple ways, it's the same thing as v of cosine of x. V of cosine of x. And so v, whatever you input into it, it just takes it to the third power. If you were to write v of x, it would be x to the third power.