And so we can rewrite all of this business as the derivative g prime of x is equal to negative six, negative six x to the negative fourth, and now we're subtracting a negative, so we could just write this as plus two x to the negative three. This negative cancels out with that negative. Subtract a negative, the same thing as adding the positive. So we did the first part. We can express g prime of x as a function of x. Now let's just evaluate what g prime of two is. So g prime of two is going to be equal to negative six times two to the negative fourth power plus two times two to the negative third power.