$\int \frac{2 x^2-1}{\left(x^2+4\right)\left(x^2-3\right)} d x=$

  • A
    $\frac{9}{14} \tan ^{-1}\left(\frac{x}{2}\right)+\frac{5}{14 \sqrt{3}} \log \left|\frac{x-\sqrt{3}}{x+\sqrt{3}}\right|+c$
  • B
    $\frac{9}{7} \tan ^{-1}\left(\frac{x}{2}\right)+\frac{5}{7 \sqrt{3}} \log \left|\frac{x-\sqrt{3}}{x+\sqrt{3}}\right|+c$
  • C
    $\frac{9}{7} \tan ^{-1}\left(\frac{x}{2}\right)-\frac{5}{7 \sqrt{3}} \log \left|\frac{x-\sqrt{3}}{x+\sqrt{3}}\right|+c$
  • D
    $\frac{9}{14} \tan ^{-1}\left(\frac{x}{2}\right)+\frac{5}{7} \log \left|\frac{x-\sqrt{3}}{x+\sqrt{3}}\right|+c$

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