0
z
w
(w/x) / (y/z)
z + W/5 = 96
If the expressions are w, x, y, z then to show that no two of them are equal is shown by(w-x)*(w-y)*(w-z)*(x-y)*(x-z)*(y-z) ≠0.
Note that w .ne. x AND x .ne. y AND y .ne. z is not enough since it is possible for x = z.