While we are having problems with the LaTeX on this site, I suggest compiling your LaTeX using Quick LaTeX and embedding the output as images in your posts.
Apparently this is separable. I have no idea how I would go about separating this.
Heres what I got so far!
I almost see a some symmetry, but I really do not know where to go from here. I tried subbing y=xv, but that got my nowhere also.
If I expand, I get:
Am I on the right track?