Msline draws a horizontal line inside of a mstack element. The position, length, and thickness of the line are specified as attributes. MathML Fundamentals
<math > <mspace linebreak="newline" indentalign="center"></mspace> <mtext style="border:1px;" mathsize="50">Msline</mtext> <mspace linebreak="newline" indentalign="center"></mspace> <mstack style="border:1px;margin:5px"> <mscarries crossout='updiagonalstrike'> <mn>2</mn> <mn>12</mn> <mscarry crossout='none'> <none/> </mscarry> </mscarries> <mn>2,327</mn> <msrow> <mo>-</mo> <mn> 1,156</mn> </msrow> <msline/> <mn>1,171</mn> </mstack> <mstack style="border:1px;margin:5px"> <mscarries crossout='updiagonalstrike'> <mn>2</mn> <mn>12</mn> <mscarry crossout='none'> <none/> </mscarry> </mscarries> <mn>2,327</mn> <msrow> <mo>-</mo> <mn> 1,156</mn> </msrow> <msline leftoverhang="20" rightoverhang="10"/> <mn>1,171</mn> </mstack> <mlongdiv longdivstyle="lefttop" style="border:1px;margin:3px"> <mn> 3 </mn> <mn> 435.3</mn> <mn> 1306</mn> <msgroup position="2" shift="-1"> <msgroup> <mn> 12</mn> <msline length="2"/> </msgroup> <msgroup> <mn> 10</mn> <mn> 9</mn> <msline length="2"/> </msgroup> <msgroup > <mn> 16</mn> <mn> 15</mn> <msline length="2"/> <mn> 1.0</mn> </msgroup> <msgroup position='-1'> <mn> 9</mn> <msline length="3"/> <mn> 1</mn> </msgroup> </msgroup> </mlongdiv> </math>