9/z^5w^2-8/zw^7 simplify
assuming the usual sloppiness with parentheses, I'll go with
9/(z^5w^2) - 8/(zw^7)
the LCD is z^5w^7, so we have
(9w^5 - 8z^4)/(z^5w^7)
not sure that's any simpler
9/(z^5w^2) - 8/(zw^7)
the LCD is z^5w^7, so we have
(9w^5 - 8z^4)/(z^5w^7)
not sure that's any simpler