<?xml version="1.0" encoding="UTF-8"?>

<math xmlns="http://www.w3.org/1998/Math/MathML">
  <mtext>Inline fenced nested fractions </mtext> 
  <mstyle displaystyle="false" scriptlevel="0">
    <mrow>
      <mrow>
        <mo form="prefix" fence="true" stretchy="true" lspace="0em" rspace="0em">[</mo> 
        <mfrac>
          <mrow>
            <mrow>
              <mo form="prefix" fence="true" stretchy="true" lspace="0em" rspace="0em">&#x02225;</mo> 
              <mfrac>
                <mrow>
                  <mrow>
                    <mi mathcolor="gray">sin</mi> 
                    <mo rspace="verythinmathspace">&#x02061;</mo> 
                    <mi>&#x003B8;</mi> 
                  </mrow> 
                  <mo form="infix">+</mo> 
                  <mn>1</mn> 
                </mrow> 
                <mn>11</mn> 
              </mfrac> 
              <mo form="postfix" fence="true" stretchy="true" lspace="0em" rspace="0em">&#x02225;</mo> 
            </mrow> 
            <mo form="infix">-</mo> 
            <mi>x</mi> 
          </mrow> 
          <mfrac>
            <msup>
              <mi>x</mi> 
              <mn>2</mn> 
            </msup> 
            <msub>
              <mi>a</mi> 
              <mn>1</mn> 
            </msub> 
          </mfrac> 
        </mfrac> 
        <mo form="postfix" fence="true" stretchy="true" lspace="0em" rspace="0em">]</mo> 
      </mrow> 
      <mo form="infix">+</mo> 
      <mrow>
        <mo form="prefix" fence="true" stretchy="false">[</mo> 
        <mn>1.0</mn> 
        <mo form="postfix" fence="true" stretchy="false">]</mo> 
      </mrow> 
    </mrow> 
  </mstyle> 
  <mtext> etc.</mtext> </math>