$%\int\limits_0^{2\pi } {\frac{{dx}}{{1 + \varepsilon \cdot \cos x}}} ,{\text{ }}0 < \varepsilon < 1 $%

$%\int {\frac{{dx}}{{\left( {x - 3} \right){{\ln }^4}\left( {x - 3} \right)}}} $%

$$\eqalign{ \int {\frac{{{x^4} - 1}}{{{x^5} + x}}dx} } $$