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

<math xmlns="http://www.w3.org/1998/Math/MathML" display="block">
  <mtext>Displayed nested fractions are normal size at the first level, </mtext> 
  <mstyle displaystyle="true" scriptlevel="0">
    <mfrac>
      <msup>
        <mn>1</mn> 
        <msqrt>
          <mn>6</mn> 
        </msqrt> 
      </msup> 
      <mrow>
        <msqrt>
          <mn>2</mn> 
        </msqrt> 
        <mo form="infix">+</mo> 
        <mfrac>
          <mn>1</mn> 
          <mrow>
            <msqrt>
              <mn>3</mn> 
            </msqrt> 
            <mo form="infix">+</mo> 
            <mfrac>
              <mn>1</mn> 
              <mrow>
                <msqrt>
                  <mn>4</mn> 
                </msqrt> 
                <mo form="infix">+</mo> 
                <mfrac>
                  <mn>1</mn> 
                  <mrow>
                    <msqrt>
                      <mn>5</mn> 
                    </msqrt> 
                    <mo form="infix">+</mo> 
                    <mfrac>
                      <mn>1</mn> 
                      <mrow>
                        <msqrt>
                          <mn>6</mn> 
                        </msqrt> 
                        <mo form="infix">+</mo> 
                        <mi>&#x02026;</mi> 
                      </mrow> 
                    </mfrac> 
                  </mrow> 
                </mfrac> 
              </mrow> 
            </mfrac> 
          </mrow> 
        </mfrac> 
      </mrow> 
    </mfrac> 
  </mstyle> 
  <mtext> script size at second level, and script-script size at all more nested levels.</mtext> </math>