Formatting of right hand side of equation should be identical to formatting of left hand side
<math xmlns="http://www.w3.org/1998/Math/MathML" display="block"> <mfrac> <mn>9</mn> <mn>14</mn> </mfrac> <mo>=</mo> <mfrac> <mn>9</mn> <mn>14</mn> </mfrac> <mfrac linethickness="0"> <mphantom> <mfrac linethickness="0"> <mphantom> <mn>1</mn> </mphantom> <mphantom> <mn>2</mn> </mphantom> </mfrac> </mphantom> <mphantom> <mfrac linethickness="0"> <mphantom> <mn>1</mn> </mphantom> <mphantom> <mn>2</mn> </mphantom> </mfrac> </mphantom> </mfrac> </math>
Author: George Chavchanidze, Opera Software ASA