Two expressions being multiplied, I'm going to use the product rule. If it was one expression being divided by another expression, then I would use the quotient rule. But in this case, it's going to be the product rule. And so that tells me that this is going to be the derivative with respect to x of the first expression. Just going to do that with the orange circle times the second expression. I'm going to do that with the blue circle plus the first expression, not taking its derivative, the first expression, times the derivative with respect to x of the second expression. Once again, here, this is just the product rule.