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"> <mtable frame="solid"> <mtr rowalign="center"> <mtd> <mphantom> <mtext>F</mtext> </mphantom> <mspace linebreak="newline"/> <mi mathvariant="normal">HT</mi> <mspace linebreak="newline"/> <mphantom> <mtext>F</mtext> </mphantom> </mtd> <mtd> <mo>=</mo> </mtd> <mtd> <mi mathvariant="normal">TH</mi> </mtd> </mtr> </mtable> </math>