TeX Quellcode:

\begin{array}{rcl} \displaystyle\int \sqrt{2x+1} \, dx &=& \int \sqrt{z} \, \dfrac{dz}{2} \cr \cr &=& \dfrac{1}{2}\displaystyle\int\sqrt{z} \, dz \cr \cr &=& \dfrac{1}{2}\cdot\dfrac{2}{3}\sqrt{z^3}+c \cr \cr &=& \dfrac{1}{3}\sqrt{z^3}+c \end{array}