z3-1z-1
Move z-1 to the numerator using the negative exponent rule 1b-n=bn.
z3-1z
Multiply z3-1 by z.
Raise z to the power of 1.
z3-1z1
Use the power rule aman=am+n to combine exponents.
z3-1+1
z3-1+1
Subtract 1 from 3.
z2+1
Add 2 and 1.
z3
z3
Simplify (z^(3-1))/(z^-1)