i have tried to use a math program, and the graph looks like this, the red dot are the roots. I think there so many of them
Now use on each side:
So that, at least, gives some solutions:
But what happens next with the remaining expression, I'm not sure. You could use and then remove the factor from both sides to get:
(which doesn't give any more answers that we haven't already got from ), or:
which you could then express simply in terms of , but it would be pretty horrendous!