MathML Fundamentals - Expression Inside Pair of Fences mfenced

The mfenced element provides a convenient form in which to express common constructs involving fences (i.e. braces, brackets, and parentheses), possibly including separators (such as comma) between the arguments. MathML Fundamentals

MFenced Test a + b a b + c a b b c a b b c a b c a b c d e

MathML

<math mathsize="100">
    <mspace linebreak="newline" indentalign="center"></mspace>
    <mtext style="border:1px;">MFenced Test</mtext>
    <mspace linebreak="newline" indentalign="center"></mspace>
    <mfenced style="border:1px">
        <mrow>
            <mi>a</mi>
            <mo>+</mo>
            <mi>b</mi>
        </mrow>
    </mfenced>
    <mspace linebreak="newline" indentalign="center"></mspace>
    <mfenced style="border:1px">
        <mfrac style="border:1px">
            <mi>a</mi>
            <mi>b</mi>
        </mfrac>
        <mo>+</mo>
        <mi>c</mi>
    </mfenced>
    <mfenced style="border:1px" open="{" close="}">
        <mfrac style="border:1px">
            <mi>a</mi>
            <mi>b</mi>
        </mfrac>
        <mi>b</mi>
        <mi>c</mi>
    </mfenced>
    <mfenced style="border:1px" open="⌈" close="⌉" separators="|">
        <mfrac style="border:1px">
            <mi>a</mi>
            <mi>b</mi>
        </mfrac>
        <mi>b</mi>
        <mi>c</mi>
    </mfenced>
    <mspace linebreak="newline" indentalign="center"></mspace>
    <mfenced style="border:1px" separators="|">
        <mi>a</mi>
        <mi>b</mi>
        <mi>c</mi>
    </mfenced>
    <mspace linebreak="newline" indentalign="center"></mspace>
    <mfenced style="border:1px" separators=",|">
        <mi>a</mi>
        <mi>b</mi>
        <mi>c</mi>
        <mi>d</mi>
        <mi>e</mi>
    </mfenced>
</math>