Let f be a function such that f of negative one is equal to three, f prime of negative one is equal to five. Let g be the function g of x is equal to two x to the third power. Let capital F be a function defined as, so capital F is defined as lowercase f of x divided by lowercase g of x. And they want us to evaluate the derivative of capital F at x equals negative one. So the way that we can do that is let's just take the derivative of capital F and then evaluate it as at x equals one. And the way they've set up capital F, this function definition, we can see that it is the quotient of two functions. So if we want to take its derivative, you might say, well maybe the quotient rule is important here.