<<< native
[ EArray
    [ AlignCenter , AlignCenter , AlignCenter ]
    [ [ [ ENumber "3" ] , [ ENumber "0" ] , [ ENumber "0" ] ]
    , [ [ EArray
            [ AlignCenter ]
            [ [ [ ENumber "2" ] ] , [ [ ENumber "2" ] ] , [ [ ENumber "2" ] ] ]
        ]
      , [ ENumber "3" ]
      , [ ENumber "0" ]
      ]
    , [ [ ENumber "0" ] , [ ENumber "3" ] , [] ]
    ]
, ESpace (0 % 1)
, EArray
    [ AlignCenter , AlignCenter , AlignCenter ]
    [ [ [ ENumber "3" ] , [ ENumber "0" ] , [ ENumber "0" ] ]
    , [ [ EArray
            [ AlignCenter ]
            [ [ [ ENumber "2" ] ] , [ [ ENumber "2" ] ] , [ [ ENumber "2" ] ] ]
        ]
      , [ ENumber "3" ]
      , [ ENumber "0" ]
      ]
    , [ [ ENumber "0" ] , [ ENumber "3" ] , [] ]
    ]
]
>>> tex
\begin{matrix}
3 & 0 & 0 \\
\begin{matrix}
2 \\
2 \\
2
\end{matrix} & 3 & 0 \\
0 & 3 & 
\end{matrix}\begin{matrix}
3 & 0 & 0 \\
\begin{matrix}
2 \\
2 \\
2
\end{matrix} & 3 & 0 \\
0 & 3 & 
\end{matrix}