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Prove that : d/dx[log((x^(2)+x+1)/(x^(...

Prove that :
`d/dx[log((x^(2)+x+1)/(x^(2)-x+1))+2/sqrt3tan^(-1)((xsqrt3)/(1-x^(2)))]=4/(1+x^(2)+x^(4))`

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