TeX Quellcode:

\begin{array}{rcl} -f(-x) &=& -\left(-93 (-x)^2 - 72(-x) +11\right) \cr &=& -\left(-93 x^2 + 72x +11\right) \cr &=& 93 x^2 - 72x - 11 \cr & \neq & f(x) \end{array}