TeX Quellcode:

\begin{array}{rcl}g'_{hh}(h,k) &=& 270\cos\left(h^2-k\right)\\& & +270h\left(-\sin\left(h^2-k\right)\cdot 2h\right)\\&=& 270\cos\left(h^2-k\right)-540h^2\sin\left(h^2-k\right)\end{array}