Evaluate: \(\smallint \frac{{dx}}{{x\left( {{x^4} + 1} \right)}}\)
1
\(\log \left| x \right| +\frac{1}{4}\log \left| {{x^4} + 1} \right| + C\)
2
\(- \log \left| x \right| - \frac{1}{4}\log \left| {{x^4} + 1} \right| + C\)
3
\(\log \left| x \right| - \frac{1}{4}\log \left| {{x^4} + 1} \right| + C\)
4
\(- \log \left| x \right| + \frac{1}{4}\log \left| {{x^4} + 1} \right| + C\)