计算(1)(-x3y2)·xyz2;(2)-4a2b·(x-y)3·ab3·(y-x)2;(3)2x3y·(-2xy)+(-2x2y)2;(4)-3x·(2x2-x+1);(5)(-3x-y)(x-y-1);(6)x2(x-1)+(x-1)(x2+x+1).
计算 (1)(-x3y2)·xyz2; (2)-4a2b·(x-y)3·ab3·(y-x)2; (3)2x3y·(-2xy)+(-2x2y)2; (4)-3x·(2x2-x+1); (5)(-3x-y)(x-y-1); (6)x2(x-1)+(x-1)(x2+x+1). |
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