mathDir

Should display RTL (y+x)

W3C sample	WIRIS
	$x+y$

<math xmlns="http://www.w3.org/1998/Math/MathML" dir="rtl">
  <mi>x</mi>
  <mo>+</mo>
  <mi>y</mi>
</math>

Author: Design Science, Inc. Neil Soiffer