munderover1

W3C sample	WIRIS
	$$\underset{ب}{\overset{ج}{س}}$$

<math xmlns="http://www.w3.org/1998/Math/MathML" display="block">
  <munderover>
    <mi>س</mi>
    <mi>ب</mi>
    <mi>ج</mi>
  </munderover>
</math>

Author: Azzeddine Lazrek, Bruce Miller