解方程1/(x^2+3x+2)+1/(x^2+5x+6)+1/(x^2+7x+12)-1/x+1
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解方程1/(x^2+3x+2)+1/(x^2+5x+6)+1/(x^2+7x+12)-1/x+1解方程1/(x^2+3x+2)+1/(x^2+5x+6)+1/(x^2+7x+12)-1/x+1解方程1
解方程1/(x^2+3x+2)+1/(x^2+5x+6)+1/(x^2+7x+12)-1/x+1
解方程1/(x^2+3x+2)+1/(x^2+5x+6)+1/(x^2+7x+12)-1/x+1
解方程1/(x^2+3x+2)+1/(x^2+5x+6)+1/(x^2+7x+12)-1/x+1
没等号呀.