计算下列各式:(1)(-2x2y3)2?(xy)3 (2)(x+y)(x2-xy+y2)(3)(x+2y-3)(x-2y+3)(4)(4a
计算下列各式:(1)(-2x2y3)2?(xy)3(2)(x+y)(x2-xy+y2)(3)(x+2y-3)(x-2y+3)(4)(4a2b7+3a3b8-4a2b6)÷...
计算下列各式:(1)(-2x2y3)2?(xy)3 (2)(x+y)(x2-xy+y2)(3)(x+2y-3)(x-2y+3)(4)(4a2b7+3a3b8-4a2b6)÷(-2ab3)2(5)4(x+1)2-2(x+5)(x-5)
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