表のテスト
$$
\begin{array}{|c|c|c|} \hline
1 & 2 & 3 \\ \hline
4 & 5 & 6 \\ \hline
7 & 8 & 9 \\ \hline
\end{array}
$$
-----
$$
\begin{array}{|c|c|c|} \hline
9 & 2 & 3 \\ \hline
4 & 5 & 6 \\ \hline
7 & 8 & 9 \\ \hline
\end{array}
$$
$$
\begin{array}{|c|c|c|} \hline
1 & 2 & 3 \\ \hline
4 & 5 & 6 \\ \hline
7 & 8 & 9 \\ \hline
\end{array}
$$
-----
$$
\begin{array}{|c|c|c|} \hline
9 & 2 & 3 \\ \hline
4 & 5 & 6 \\ \hline
7 & 8 & 9 \\ \hline
\end{array}
$$