Confusion! I am not the OP and I didn't reply to your post.
My reply was to LoiLe's initial post. The LHS of his equation can be simplified to x (at least if you ignore the fact that we have a lot of ambiguities here and the LHS in fact simplifies to an infinite numer of results). And so he is trying to find solution for the identity x=x.
Its not the first time LoiLe is posting that kind of question and he was informed a couple of times abou the various ambiguities when you deal with complex numbers and also about the limitations of Mathcad's symbolic (which can't simplify the LHS to x without a little help.
The remark about teasing us was meant tongue in cheek as I guess the real issue is a language problem.
This is the step Mathcad is not capable of
Then the simplification is no problem
and probably Mathcad is here using the conversion
BTW, how did you arrived at your solutions?