First of all, the derivative of a sum is equal to the sum of the derivatives. So the derivative of the first 2x is 2. The hard part will be evaluating the derivative of . It's a composition of functions, so the chain rule will need to be used. I always use Leibnitz notation for the chain rule, since it is easier. In this case you will need to do .

So first, if we have , then we let . Then .

As for finding , we notice that . Can you use the Chain Rule to evaluate this final derivative?