Question 950323
Do it like this one.
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Simplify the expression.
 
((x^4y^-2)/(x^-3y^5))^-1
Invert
= {{{x^-3y^5/(x^4y^-2)}}}
Multiply NUM and DEN by x^3
= {{{y^5/(x^7y^-2)}}}
Multiply NUM and DEN by y^2
= {{{y^7/x^7}}}