I'll try one of the easy ones for warmup; I'll do the rest, if I can, later.

8) This is quite easy. You just break it into sections, and use the product rule.

So, first work with

Is equal to

as every good calc student knows. (Well, plus a constant, but we'll just stick that in at the end)

now,

is equal to

Now apply the product rule

I'll leave you to solve.