TeX Quellcode:
{z_2^3=2^3\left(\cos\left(3\cdot\dfrac{4\pi}{3}\right)+i\sin\left(3\cdot\dfrac{4\pi}{3}\right)\right)=8\left(\cos\left(4\pi\right)+i\sin\left(4\pi\right)\right)=8\left(\cos\left(0\right)+i\sin\left(0\right)\right)=8}