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计算:(1)1220-5215+515+45-12405;(2)43-118+13-7198;(3)b+a3b-(b3+1ab);(4)x4y4-x2y2-xy2+y3x-y(x>y>0).-数学
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1223-632-1224.-数学
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题目简介
计算:5x5+x5x.-数学
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