计算 (-3xy²)²·(2x²y)³+(-2x²y²)³·3x²y
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计算(-3xy²)²·(2x²y)³+(-2x²y²)³·3x²y计算(-3xy²)²·(2x
计算 (-3xy²)²·(2x²y)³+(-2x²y²)³·3x²y
计算 (-3xy²)²·(2x²y)³+(-2x²y²)³·3x²y
计算 (-3xy²)²·(2x²y)³+(-2x²y²)³·3x²y
原式= 9x²y⁴·8x^6y³+(-8x^6y^6)·3x²y
=72x^8y^7-24x^8y^7
=48x^8y^7