TeX Quellcode:

\begin{array}{rcl} f'_{zx}(x,y,z) &=& \dfrac{-16z \cdot\left(17x^2+y^2\right)-(-16xz)\cdot 34x}{\left(17x^2+y^2\right)^2} \\\\&=& \dfrac{-272x^2z-16y^2z+544x^2z}{\left(17x^2+y^2\right)^2} \\\\ &=& \dfrac{272x^2z-16y^2z}{\left(17x^2+y^2\right)^2}\end{array}