We've been given some interesting information here about the functions f, g, and h. For f, they tell us for given values of x what f of x is equal to and what f prime of x is equal to. Then they define g of x for us in terms of this kind of absolute value expression. And then they define h of x for us in terms of both f of x and g of x. And what we're curious about is what is the derivative with respect to x of h of x at x is equal to 9. And so I encourage you to pause this video and think about it on your own before I work through it. So let's think about it a little bit. So another way just to get familiar with the notation of writing this, the derivative of h of x with respect to x at x equals 9.