TeX Quellcode:
\begin{array}{rclcrcl} \mathbb{D} &=& \mathbb{R}\backslash_{\{\frac{\pi}{2}+k\pi; \; k\in\mathbb{Z}\}} \cr\cr \displaystyle\int \dfrac{x}{\cos^2(x)} \, dx &=& \displaystyle\int x\cdot\dfrac{1}{\cos^2(x)} \, dx \cr\cr \quad u' &=& \dfrac{1}{\cos^2(x)} &\Rightarrow & u &=& \tan(x) \cr v &=& x & \Rightarrow & v' &=& 1 \end{array}