Question 94066
Simplify
{{{(m^4)^3/(m^3)^2}}}{{{(m^2)^9/(m^3)^2}}}
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(m^12)(m^18)/(m^12)
(m^30)/(m^12)    
= m^18

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Comment:
It looks like you thought you could put the numerator product
over a common denominator.  Common denominators are needed for addition
and subtraction but factors in the denominators need to be multiplied
when multiplication of fractions is involved.
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Cheers,
Stan H.