indefinite-integration

Question: $\int_{{}}^{{}}{{{x}^{2}}\sec {{x}^{3}}\ dx}=$

1) $\log (\sec {{x}^{3}}+\tan {{x}^{3}})$

2) $3(\sec {{x}^{3}}+\tan {{x}^{3}})$

3) $\frac{1}{3}\log (\sec {{x}^{3}}+\tan {{x}^{3}})$

4) None of these

Solution:

Explanation: No Explanation

Integration by substitution

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