\[\int{{{e}^{3\log x}}{{({{x}^{4}}+1)}^{-1}}dx}\] is equal to

1.	\[\int{{{e}^{3\log x}}{{({{x}^{4}}+1)}^{-1}}dx}\] is equal to
A.	\[\log ({{x}^{4}}+1)+C\]
B.	\[\frac{1}{4}\log ({{x}^{4}}+1)+C\]
C.	\[-\log ({{x}^{4}}+1)+C\]
D.	None of these
Answer» C. \[-\log ({{x}^{4}}+1)+C\]

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\[\int{{{e}^{3\log x}}{{({{x}^{4}}+1)}^{-1}}dx}\] is equal to

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