计算2(a-1)²-3(a+2)²-4(a+2)(a-1)
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计算2(a-1)²-3(a+2)²-4(a+2)(a-1)
计算2(a-1)²-3(a+2)²-4(a+2)(a-1)
计算2(a-1)²-3(a+2)²-4(a+2)(a-1)
计算2(a-1)²-3(a+2)²-4(a+2)(a-1)
计算2(a-1)²-3(a+2)²-4(a+2)(a-1)
计算2(a-1)²-3(a+2)²-4(a+2)(a-1)