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题型:解答题 题类:常考题 难易度:普通

计算:

(1)(﹣2014×(1.5)2015﹣20140

(2)(x+y)2﹣(x﹣y)(x+y);

(3)[x(x2y2+xy)﹣y(x2﹣x3y)]÷3x2y;

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