So the whole point here is to appreciate how to recognize compositions of functions. Now, I wanna stress, it's not always going to be a composition of a function. For example, if I have some function, let me just clear this out. If I had some function f of x is equal to cosine of x times sine of x, it would be hard to express this as a composition of functions, but I can represent it as the product of functions. For example, I could say cosine of x, I could say u of x is equal to cosine of x, and I could say v of x, let me use a different color, I could say v of x is equal to sine of x. And so here, f of x wouldn't be the composition of u and v, it would be the product. F of x is equal to u of x times v of x, v of x.