TeX Quellcode:

\begin{array}{rcl} \displaystyle\int x^2 \cdot e^x \, dx &=& x^2 \cdot e^x - 2 \int x \cdot e^x \, dx \cr\cr &=& x^2 \cdot e^x - 2 \left(x\cdot e^x - e^x\right) +c \cr\cr &=& e^x\left(x^2-2x+2 \right)+c\end{array}