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

    <!-- The <mfenced> element should be equivalent to its "expanded" form with
         <mrow> and <mo> elements, as described in the MathML specification.
         Note that the MathML operator dictionary defines "(" and ")" as fences,
         so we don't need an explicit "fence" attribute on the <mo> elements.-->
    <math>
      <mrow>
        <mo>(</mo>
        <mrow>
          <mspace width="48px" height="24px" depth="24px" mathbackground="#0f0"/> 
          <mo separator="true">,</mo>
          <mspace width="48px" height="24px" depth="24px" mathbackground="#0f0"/> 
          <mo separator="true">,</mo>
          <mspace width="48px" height="24px" depth="24px" mathbackground="#0f0"/> 
        </mrow> 
        <mo>)</mo>
      </mrow>
    </math>

  </body>
</html>