Hello everyone. We were given homework on finding the domain and I managed to solve (a), (b), and (c) in the attached picture. On item number 5, it is asking me to get [(f·g)∘h](4). I just wanted to know if there's a shortcut or an easier way to arrive at the answer? Because looking at f(x), g(x), and h(x), they all seem... a little too complicated.

Thanks very much for your help!