The FTC derivative stuff is just skill practice. The world will not end if you don't get the answers the first time through.
Your calculus world will be much more unpleasant if you do not get the derivatives on the other sheet though. You must have those. Must.
Next, you should also be able to do the integrals, or at least use it as a good learning tool because the answers to the integrals are the derivatives above ... and yes, I was quite proud of that. I also gave hints for what to use as 'u' in the chain rule integrals but do not forget to do the du substitution that makes the whole process work.
Download AB FTC and CR Practice 2-21