-3xy[6xy²+(-1/3x²y)]

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-3xy[6xy²+(-1/3x²y)]
x)56TS6457p*5cm )/9 %@5qFqFf`iM%TТR(_\g`4\

-3xy[6xy²+(-1/3x²y)]
-3xy[6xy²+(-1/3x²y)]

-3xy[6xy²+(-1/3x²y)]
-3xy[6xy²+(-1/3x²y)]
=-3x^2y^2(6y-1/3x)
=-9x^2y^2(18y-x)