Question 1079332
{{{A/x+B/x^2+(Cx+D)/(x^2+x+1)}}}


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{{{system(A+C=0,A+B+D=0,A+B=1,B=-1)}}}


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{{{system(A=2,B=-1,C=-2,D=-1)}}}


{{{highlight(2/x-1/x^2-(2x+1)/(x^2+x+1))}}}