<!doctype html>
<html>
  <head>
    <title>mfenced</title>
    <meta charset="utf-8"/>
  </head>
  <body>

    <!-- <mfenced> element with stretchy parenthesis and comma separators. -->
    <math>
      <mfenced>
        <mspace width="48px" height="24px" depth="24px" mathbackground="#0f0"/> 
        <mspace width="48px" height="24px" depth="24px" mathbackground="#0f0"/> 
        <mspace width="48px" height="24px" depth="24px" mathbackground="#0f0"/> 
      </mfenced>
    </math>

  </body>
</html>