And so if I'm just multiplying two expressions, that's a pretty good clue that to compute this part, I would then use the product rule. And I could keep doing that and compute it, and I encourage you to do so, but this is more about the strategies and how do you recognize them. But now let's go to the other example. Well, this looks a lot more like this step of the first problem than the beginning of the original problem. Here, I don't have a sine of a bunch of stuff or a bunch of stuff being raised to one exponent. Here, I have the product of two expressions, just like we saw over here. We have this expression being multiplied by this expression.