TeX Quellcode:

\begin{array}{rcl} \mathbb{D} &=& \mathbb{R} \cr\cr f'(x) &=& \dfrac{1}{4} \cdot 4 \cdot x^{4-1}-\dfrac{1}{3} \cdot 3 \cdot x^{3-1}+ \dfrac{1}{2} \cdot 2 \cdot x^{2-1}-1 \cdot 1 \cdot x^{1-1}+0 \cr &=& x^3-x^2+x-1 \end{array}