\begin{deloppgaver}
  \delo
    \[D(x^5) = 5x^{5-1} = 5x^4\]

  \delo
    \[f'(x) = '(\frac{1}{4}x^2) = \frac{1}{2}x\]

  \delo
    \[\frac{d}{dx}5 = 0\]
\end{deloppgaver}