TeX Quellcode:

{z_1^3=2^3\left(\cos\left(3\cdot\dfrac{2\pi}{3}\right)+i\sin\left(3\cdot\dfrac{2\pi}{3}\right)\right)=8\left(\cos\left(2\pi\right)+i\sin\left(2\pi\right)\right)=8\left(\cos\left(0\right)+i\sin\left(0\right)\right)=8}