尽管你写的辛苦,但是我判断不出来分子都包括什么,请多加几个括弧,小括弧就行。
已知x=2008,y=2006,求x-x÷{x^2-y^2/x^3+y^3[(x-x^2+y^2/y)÷(1/x-1/y
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