<math xmlns="http://www.w3.org/1998/Math/MathML"> <mfenced open="["> <mrow> <mi>a</mi> <mo>+</mo> <mi>b</mi> </mrow> </mfenced> <mfenced open="{" close="}" separators="|;+"> <mfrac> <mi>a</mi> <mi>b</mi> </mfrac> <mfrac> <mi>d</mi> <mi>e</mi> </mfrac> <mi>a</mi> <mi>b</mi> <mi>a</mi> <mi>b</mi> </mfenced> </math>
Author: Robert Miner and Jeff Schaefer, Geometry Technologies