TeX Quellcode:

\begin{array}{rcl} -f(-x) &=& -\left((-x)^4-5(-x)^2+4\right) \cr &=& -\left(x^4-5x^2+4\right) \cr &=& -x^4+5x^2-4 \cr & \neq & f(x) \end{array}