计算:(1)(-3x)(2x2-5)+(x+1)(x-1)+1;(2)2(x-2y)2-(x-2y)(x+2y)-(x+2y)2
计算:(1)(-3x)(2x2-5)+(x+1)(x-1)+1;(2)2(x-2y)2-(x-2y)(x+2y)-(x+2y)2....
计算:(1)(-3x)(2x2-5)+(x+1)(x-1)+1;(2)2(x-2y)2-(x-2y)(x+2y)-(x+2y)2.
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