So this is gonna be the product rule, product rule. I would take the derivative of the first expression, so x, derivative of x squared is two x, let me write a little bit to the right. This is gonna be two x times the second expression, sine of x, plus the first expression, x squared, times the derivative of the second one, cosine of x. That's just the product rule as applied to this part right over here. And all of that, of course, is being multiplied by this up front, which actually, let me just rewrite that. So all of this I could rewrite as, let's see. This would be three times, if I have the product of things raised to the second power, I could take each of them to the second power and then take their product.