题目内容
(A) (a5·a2)2÷[ (a8+a3)·a2]=a2 (B) ax2· (x3y2)n÷ (-xny)3=-ax2y2n-3 (C) (-12x5y6+8x4y5)÷ (-4x3y3)=3x2y2-2x2 (D) (x+y)2- (x3+y3)÷ (x+y)=xy