Now, to evaluate this right over here, it does definitely make sense to use the chain rule, use the chain rule. And so what is this going to be? Well, I have the derivative of something to the third power, so that's going to be three times that something squared times the derivative of that something. So in this case, the something is sine of x, and the derivative of sine of x is cosine of x. And then I have all of this business over here. I have six x to the fifth, sine to the third, or sine of x to the third power, plus x to the sixth. And if I were to just simplify this a little bit, in fact, you see it very clearly, these two things are equivalent.