TeX Quellcode:

{5\cdot\dfrac{64s^2-256t^2}{\left(8s-16t\right)^2} = \dfrac{5\left(8s-16t\right)\left(8s+16t\right)}{\left(8s-16t\right)^2} = \dfrac{5\left(8s+16t\right)}{8s-16t} = \dfrac{40s+80t}{8s-16t} = \dfrac{8\left(5s+10t\right)}{8\left(s-2t\right)} = \dfrac{5s+10t}{s-2t}}