"col1"> string</td> <td>convert to string with symbolic variables</td></tr>
</table>
<h2>Operators</h2>
<table class="list">
  <tr><td style="white-space: nowrap;" class="col1"> * </td> <td>compound two elementary transforms</td></tr>
  <tr><td style="white-space: nowrap;" class="col1"> + </td> <td>compound two elementary transforms</td></tr>
</table>
<h2>Notes</h2>
<ul>
  <li>The sequence is an array of objects of superclass ETS3, but with
distinct subclasses: Rx, Ry, Rz, Tx, Ty, Tz.</li>
  <li>Use the com