This is LaTeX code:

[latex]
 
A := \left(
\begin{array}{lll}
 0 & 0 & 0 \\
 0 & 0 & 1 \\
 1 & 0 & 0
\end{array}
\right)\!\!,\ \ A^2 = \left(
\begin{array}{lll}
 0 & 0 & 0 \\
 1 & 0 & 0 \\
 0 & 0 & 0
\end{array}
\right)\!\!,\ \ A^3 = \left(
\begin{array}{lll}
 0 & 0 & 0 \\
 0 & 0 & 0 \\
 0 & 0 & 0
\end{array}
\right)
 
[/latex]