计算2x2y?(12-3xy+y3)的结果是( )A.x2y-6x3y2+2x2y3B.x2y-2x2y4C.x2y-6x3y2+2x2y4D.-6x3y2+2x
计算2x2y?(12-3xy+y3)的结果是()A.x2y-6x3y2+2x2y3B.x2y-2x2y4C.x2y-6x3y2+2x2y4D.-6x3y2+2x2y4...
计算2x2y?(12-3xy+y3)的结果是( )A.x2y-6x3y2+2x2y3B.x2y-2x2y4C.x2y-6x3y2+2x2y4D.-6x3y2+2x2y4
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