化简x^2-2x+1/x^2+1÷x-1/x^2+2-x
化简x^2-2x+1/x^2+1÷x-1/x^2+2-x[(x^2-2x+1)/(x^2+1)]÷[(x-1)/(x^2+2)]-x...
化简x^2-2x+1/x^2+1÷x-1/x^2+2-x
[(x^2-2x+1)/(x^2+1)]÷[(x-1)/(x^2+2)]-x 展开
[(x^2-2x+1)/(x^2+1)]÷[(x-1)/(x^2+2)]-x 展开
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