TeX Quellcode:

\begin{array}{rcl}\mathbb{D} &=& \mathbb{R}\times\mathbb{R} \\\\g(x,y) &=& \left(5x+22\right)^2+9x^2y+y^2 \\&=& 25x^2+220x+484+9x^2y+y^2\end{array}