(-三分之四xy)(-3x²y)²

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(-三分之四xy)(-3x²y)²(-三分之四xy)(-3x²y)²(-三分之四xy)(-3x²y)²-12x5y3(-4/3xy)(-3x

(-三分之四xy)(-3x²y)²
(-三分之四xy)(-3x²y)²

(-三分之四xy)(-3x²y)²
-12x5y3


(-4/3xy)(-3x²y)²
原式=4/3*3x^5y^3
=4x^5y^3