TeX Quellcode:

\begin{array}{rcl} \prod\limits_{i=0}^5x^i &=& x^0 \cdot x^1 \cdot x^2 \cdot x^3 \cdot x^4 \cdot x^5 \cr &=& x^{0+1+2+3+4+5} \cr &=& x^{15} \end{array}