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[" 23."int(x^(2))/(x^(4)+3x^(2)+9)dx=A t...

[" 23."int(x^(2))/(x^(4)+3x^(2)+9)dx=A tan^(-1)((x^(2)-3)/(3x))+(B)/(sqrt(3))ln],[|(x^(2)-sqrt(3)x+3)/(x^(2)+sqrt(3)x+3)|+C" then find the value of "12(A+B)]

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Evaluate: int(x^(2)/(x^(4)+3x^(2)+9))dx =Atan^(-1)((x^2-3)/(3x))+B/sqrt(3)"ln"|(x^(2)-sqrt(3)x+3)/(x^(2)+sqrt(3)x+3)|+c , Then find the value of 12(A+B) .

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