Yes, you basically need to integrate. If you've never done an antiderivative before, then I suggest you look at a tutorial like this:
Pauls Online Notes : Calculus I - Integrals
For the first one you have:
If you differentiate the right side, you'll get the left side for any value of C, which is a constant. The point allows you to find C so you can determine the exact function:
Solve for C...