TeX Quellcode:

{ 4 \left(\cos\left(\dfrac{3\pi}{4} \right)+i \sin\left(\dfrac{3\pi}{4} \right) \right) \; : \; \left( \dfrac{2}{5} \left(\cos\left(\dfrac{5\pi}{12}\right)+i \sin\left(\dfrac{5\pi} {12} \right) \right) \right) \; = \; 4\cdot\dfrac{5}{2} \left(\cos\left(\dfrac{3\pi}{4}-\dfrac{5\pi}{12} \right)+i \sin\left(\dfrac{3\pi}{4}-\dfrac{5\pi}{12} \right) \right) \; = \; 10 \, \left(\cos\left(\dfrac{\pi}{3}\right)+i \sin\left(\dfrac{\pi} {3}\right)\right) }