<math xmlns="http://www.w3.org/1998/Math/MathML"> <mfrac> <mn>1</mn> <mn>2</mn> </mfrac> <mo>+</mo> <mstyle mathbackground="yellow"> <mpadded lspace="+8pt" voffset="+8pt"> <mi>X</mi> <mo>+</mo> <mi>Y</mi> </mpadded> </mstyle> <mo>=</mo> <mi>a</mi> <mo>-</mo> <mi>b</mi> </math>
Author: Design Science, Inc. (D. Doyle, E. Cannon, E. Tabacman, R.Miner)