Right hand side of equation should look like mirrored copy of left hand side
<math xmlns="http://www.w3.org/1998/Math/MathML" display="block"> <mover> <mrow> <mmultiscripts> <mi mathvariant="normal">A</mi> <mprescripts/> <mi mathvariant="normal">Y</mi> <mi mathvariant="normal">X</mi> </mmultiscripts> </mrow> <mphantom> <mtext>fail</mtext> </mphantom> </mover> <mo>=</mo> <msubsup> <mi mathvariant="normal">A</mi> <mi mathvariant="normal">Y</mi> <mi mathvariant="normal">X</mi> </msubsup> </math>