" style="height:0.43056em;"></span><span class="strut bottom" style="height:0.43056em;vertical-align:0em;"></span><span class="base textstyle uncramped"><span class="mord mathit">x</span></span></span></span></eq>d</p>
</td>
      <td style="text-align:left;">non-numeric character before opening $ or
after closing $ or both is allowed.</td>
    </tr>
   <tr id="#17">
      <td style="text-align:right;">17</td>
      <td style="text-align:center;">&#128522;</td>
      <td style="text-align:left;">$x$ $ </td>