$${1 \over {2\sqrt 3 }}\log \left| {{{\tan {x \over 2} - 2 - \sqrt 3 } \over {\tan {x \over 2} - 2 + \sqrt 3 }}} \right| + c$$

$${{\sqrt 3 } \over 2}\log \left| {{{\tan {x \over 2} - 2 - \sqrt 3 } \over {\tan {x \over 2} - 2 + \sqrt 3 }}} \right| + c$$

$${1 \over {\sqrt 3 }}\log \left| {{{\tan {x \over 2} - 2 - \sqrt 3 } \over {\tan {x \over 2} - 2 + \sqrt 3 }}} \right| + c$$

None of the above

$${{{x^{39}}} \over {3{{({x^{13}} + {x^5} + 1)}^3}}} + C$$

$${{{x^{39}}} \over {{{({x^{13}} + {x^5} + 1)}^3}}} + C$$

$${{{x^{39}}} \over {5{{({x^{13}} + {x^5} + 1)}^3}}} + C$$

None of these