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. This term is exactly equivalent to this term, the way it's written. And then this is exactly, if you multiply three times x to the sixth, sine of x squared cosine of x. So the nice thing about math, if we're doing things that make logical sense, we should get to the same end point.