1. The problem statement, all variables and given/known data Problem #7 in this old exam: http://math.njit.edu/pdfs/222ex1.pdf ... note: i didnt care about getting the IVP solvied... this is just practice and getting the general solution was all i cared about doing 2. The attempt at a solution http://wolfsfiles.googlepages.com/scan.jpg I think i confirmed my answer in a cas. But my confussion is if i plug the original differential equation, without making that substitution, that i get a differant general solution... and i'm not entirely sure if thats to be expected. In short, is my answer correct :P 3. Quick question about a differant problem Problem #3-A on that old exam: "(d/dx)[sec(x)y]=x ...get general solution" should the left side be expanded first, and then work the problem, or am i not seeing some easy way to seperate this thing right away.