ion.</td>
    </tr>
   <tr id="#22">
      <td style="text-align:right;">22</td>
      <td style="text-align:center;">&#128522;</td>
      <td style="text-align:left;">$$\begin{pmatrix}x_2 \\ y_2 \end{pmatrix} = 
\begin{pmatrix} A & B \\ C & D \end{pmatrix}\cdot
\begin{pmatrix} x_1 \\ y_1 \end{pmatrix}$$</td>
      <td style="text-align:left;"><section><eqn><span class="katex-display"><span class="katex"><span class="katex-mathml"><math><semantics><mrow><mrow><mo fence="true">(</mo><mtable><mtr><mtd><mrow><