indefinite-integration

Question: $\int{{{e}^{3\log x}}{{({{x}^{4}}+1)}^{-1}}\,\,dx}$=



1) $\log ({{x}^{4}}+1)+c$
2) $\frac{1}{4}\log ({{x}^{4}}+1)+c$
3) $-\log ({{x}^{4}}+1)+c$
4) None of these
Solution: Explanation: No Explanation
Integration by substitution

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