TeX Quellcode:

\begin{array}{rcl}z_1^4 &=& \left(\dfrac{1}{2}\right)^4e^{i\,\cdot 4\cdot\frac{5\pi}{4}} \\ \\ &=& \dfrac{1}{16} e^{i\,\cdot 5\pi} \\ \\ &=& \dfrac{1}{16} e^{i\,\pi} \\ \\ &=& -\dfrac{1}{16}\end{array}