Question 39771
x-y/x-(y-z) - z-x/(y-x) - z 

x-y/x-y+z - z-x/-x+y-z

x-y/x-y+z - z-x/(-1)(x-y+z)

x-y/x-y+z + z-x/x-y+z

x-y+z-x/x-y+z

x-y+z-x/x-y+z

z-y/x-y+z

The answer is : z-y/x-y+z