MathML3 specification example
<math xmlns="http://www.w3.org/1998/Math/MathML"> <mstack> <msgroup> <mn>123</mn> <msrow> <mo>×</mo> <mn>321</mn> </msrow> </msgroup> <msline/> <msgroup shift="1"> <mn>123</mn> <mn>246</mn> <mn>369</mn> </msgroup> <msline/> </mstack> </math>
Author: MathML3