While the expressions 1/z^2 and z^-2 are equivalent, in many signal processing applications the z^-2 form is more useful. However Mathematica will usually express the form as 1/z^2. Is there a way to force Mathematica to display the alternative form?
One way could be to inactivate Power:
1/z - x/y^2 /. Power -> Inactive[Power]
Good approach. Thank you.