Now we just have to figure out the derivative with respect to x of x squared, and we've seen that many times before. That, we just use the power rule, that's going to be two x. Two x. And so if we wanted to write the dy dx, let me get a little bit of a mini drum roll here, this shouldn't take us too long. Dy dx, I'll multiply the three times the two x, which is going to be six x, so I covered those so far, times sine squared of x squared, times sine squared of x squared, times cosine of x squared. And we are done. So we're applying the chain rule multiple times.