indefinite-integration

Question: $\int{\frac{dx}{{{x}^{2}}+4x+13}}$ is equal to

1) $\log ({{x}^{2}}+4x+13)+c$

2) $\frac{1}{3}{{\tan }^{-1}}\left( \frac{x+2}{3} \right)+c$

3) $\log (2x+4)+c$

4) $\frac{2x+4}{{{({{x}^{2}}+4x+13)}^{2}}}+c$

Solution:

Explanation: No Explanation

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