Display:

$opening-fencearg\#1sep\#1...sep\#(n-1)arg\#nclosing-fence$

Source:

<mrow>
     <mo fence="true"> opening-fence </mo>
     <mrow> arg#1
          <mo separator="true"> sep#1 </mo> ...
          <mo separator="true"> sep#(n-1) </mo> arg#n
     </mrow>
     <mo fence="true"> closing-fence </mo>
</mrow>