计算(x的2n次方-2x的n次方+y的2n次方)÷(x的n次方-y的n次方)

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计算(x的2n次方-2x的n次方+y的2n次方)÷(x的n次方-y的n次方)
计算(x的2n次方-2x的n次方+y的2n次方)÷(x的n次方-y的n次方)

计算(x的2n次方-2x的n次方+y的2n次方)÷(x的n次方-y的n次方)
(x的2n次方-2x的n次方y的n次方+y的2n次方)÷(x的n次方-y的n次方) =(x的n次方-y的n次方)÷(x的n次方-y的n次方) =x的n次方-y的n次方