TeX Quellcode:

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}