For "x =-2" Did you mean "w=-2"? Otherwise something is missing here..
This was a strange one to answer....lol
I tried narrowing it down to what this was supposed to mean, once again it seems there's some things missing from the equation, there is no "x" and who knows what else maybe wrong with it.
Xy/z if x=-2, y=-3, and z=4
(the answer = -5/4)