class="mbin">+</span><span class="mord mathrm">1</span><span class="mrel">=</span><span class="mord mathrm">2</span></span></span></span></span></eqn></section></td>
      <td style="text-align:left;">display equation on its own single line.</td>
    </tr>
   <tr id="#14">
      <td style="text-align:right;">14</td>
      <td style="text-align:center;">&#128522;</td>
      <td style="text-align:left;">${e}_x$

$$e_\alpha$$</td>
      <td style="text-align:left;"><p><eq><span class="katex"><span class="katex