2x2y?(12?3xy+y2)的计算结果是( )A.x2y-6x3y2+2x2y3B.-x2y+2x2y4C.2x2y4+x2y-6x3y2D.-6x3y2+2x2
2x2y?(12?3xy+y2)的计算结果是()A.x2y-6x3y2+2x2y3B.-x2y+2x2y4C.2x2y4+x2y-6x3y2D.-6x3y2+2x2y4...
2x2y?(12?3xy+y2)的计算结果是( )A.x2y-6x3y2+2x2y3B.-x2y+2x2y4C.2x2y4+x2y-6x3y2D.-6x3y2+2x2y4
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