Well, it's the exact same thing. I just swapped an a for the x's. This is still going to be equal to 2a. Now, I will do something that might be a little bit more bizarre. What if I were to take the derivative with respect to sine of x with respect to sine of x of sine of x squared? Well, wherever I had the x's up here or the a's over here, I just replaced it with a sine of x. So this is just going to be 2 times the thing that I had.