Hi, princessmath.

Nice work so far. Something did catch my eye. You have the line

.

We need to be careful at this point, because the next step is to take an antiderivative with respect to x. Since there are functions of x on the right hand side we cannot do this by putting x's in front of them like we were able to put y in front of F(x) in the previous integration.

Does this make sense? Let me know if there are any questions.

Good luck!