TeX Quellcode:
{\left(\dfrac{2}{3}\left(\cos\left(\dfrac{7\pi}{12}\right)+i \sin\left(\dfrac{7\pi}{12}\right)\right)\right)^3 \; = \; \left(\dfrac{2}{3}\right)^3 \left(\cos\left(3 \cdot \dfrac{7\pi}{12}\right)+i \sin\left(3 \cdot \dfrac{7\pi}{12}\right)\right) \; = \; \dfrac{8}{27} \left( \cos\left( \dfrac{7 \pi} {4}\right)+i \sin \left( \dfrac{7\pi} {4} \right) \right)}