<menclose>

The <menclose> MathML element renders its content inside an enclosing notation specified by the notation attribute.

Attributes

This element's attributes include the global MathML attributes.

notation

A list of notations, separated by white space, to apply to the child elements. The symbols are each drawn as if the others are not present, and therefore may overlap. Possible values are:

Value	Sample Rendering	Rendering in your browser	Description
longdiv (default)		$\overline{)a^2+b^2}$	long division symbol
actuarial		$\overline{a^2+b^2\hspace{.2em}|}$	actuarial symbol
box		$\boxed{a^2+b^2}$	box
roundedbox		$\boxed{a^2+b^2}$	rounded box
circle		$\overline{)a^2+b^2}$	circle
left		$\overline{)a^2+b^2}$	line to the left of the contents
right		$\overline{)a^2+b^2}$	line to the right of the contents
top		$\overline{a^2+b^2}$	line above of the contents
bottom		$\underline{a^2+b^2}$	line below of the contents
updiagonalstrike		$\cancel{a^2+b^2}$	strikeout line through contents from lower left to upper right
downdiagonalstrike		$\bcancel{a^2+b^2}$	strikeout line through contents from upper left to lower right
verticalstrike		$\overline{)a^2+b^2}$	vertical strikeout line through contents
horizontalstrike		$\sout{a^2+b^2}$	horizontal strikeout line through contents
madruwb		$\overline{)a^2+b^2}$	Arabic factorial symbol
updiagonalarrow		$\overline{)a^2+b^2}$	diagonal arrow
phasorangle		$\phase{a^2+b^2}$	phasor angle

Examples

html,
body {
  height: 100%;
}

body {
  display: grid;
  place-items: center;
  font-size: 2rem;
}

<math display="block">
  <menclose notation="circle box">
    <mi>x</mi>
    <mo>+</mo>
    <mi>y</mi>
  </menclose>
</math>

Sample rendering:

Rendering in your browser:

Technical summary

Specifications

The <menclose> element is not defined in any browser-oriented specification but you can find a description in MathML 4.