<PRE><B>Question 1093900</B>
(-m^2n^-1)^-2/(mn)^-1 
simplify 
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(mn)/(-m^2n^-1)^2
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= (mn)/(m^4*n^-2)
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= (mn^3/m^4)
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= n^3/m^3
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Cheers,
Stan H.
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