Give the derivative \(f'(x)\) of the following functions:

\begin{enumerate}
\item
  \nbPointsEnumi{2}\(f(x) = x^{3} - 3x^{2}\)
\item
  \nbPointsEnumi{2}\(f(x) = 2x^{2} + x - 3\)
\item
  \nbPointsEnumi{2}\(f(x) = \dfrac{1}{2}x - \dfrac{1}{3}x^{3} + \dfrac{2}{3}x^{6}\)
\end{enumerate}
