10.test

<<< native
[ ESub (EIdentifier "\981") (EIdentifier "n")
, EDelimited "(" ")" [ Right (EIdentifier "\954") ]
, ESymbol Rel "="
, EFraction
    NormalFrac
    (ENumber "1")
    (EGrouped
       [ ENumber "4"
       , ESuper (EIdentifier "\960") (ENumber "2")
       , ESuper (EIdentifier "\954") (ENumber "2")
       ])
, ESubsup (ESymbol Op "\8747") (ENumber "0") (ESymbol Ord "\8734")
, EFraction
    NormalFrac
    (EGrouped
       [ EMathOperator "sin"
       , EDelimited
           "(" ")" [ Right (EIdentifier "\954") , Right (EIdentifier "R") ]
       ])
    (EGrouped [ EIdentifier "\954" , EIdentifier "R" ])
, EFraction
    NormalFrac
    (ESymbol Ord "\8706")
    (EGrouped [ ESymbol Ord "\8706" , EIdentifier "R" ])
, EDelimited
    "["
    "]"
    [ Right (ESuper (EIdentifier "R") (ENumber "2"))
    , Right
        (EFraction
           NormalFrac
           (EGrouped
              [ ESymbol Ord "\8706"
              , ESub (EIdentifier "D") (EIdentifier "n")
              , EDelimited "(" ")" [ Right (EIdentifier "R") ]
              ])
           (EGrouped [ ESymbol Ord "\8706" , EIdentifier "R" ]))
    ]
, ESpace (1 % 6)
, EIdentifier "d"
, EIdentifier "R"
]
>>> mml
<?xml version='1.0' ?>
<math display="block" xmlns="http://www.w3.org/1998/Math/MathML">
  <mrow>
    <msub>
      <mi>ϕ</mi>
      <mi>n</mi>
    </msub>
    <mrow>
      <mo stretchy="true" form="prefix">(</mo>
      <mi>κ</mi>
      <mo stretchy="true" form="postfix">)</mo>
    </mrow>
    <mo>=</mo>
    <mfrac>
      <mn>1</mn>
      <mrow>
        <mn>4</mn>
        <msup>
          <mi>π</mi>
          <mn>2</mn>
        </msup>
        <msup>
          <mi>κ</mi>
          <mn>2</mn>
        </msup>
      </mrow>
    </mfrac>
    <msubsup>
      <mo>∫</mo>
      <mn>0</mn>
      <mi>∞</mi>
    </msubsup>
    <mfrac>
      <mrow>
        <mrow>
          <mi mathvariant="normal">sin</mi>
          <mo>&#8289;</mo>
        </mrow>
        <mrow>
          <mo stretchy="true" form="prefix">(</mo>
          <mi>κ</mi>
          <mi>R</mi>
          <mo stretchy="true" form="postfix">)</mo>
        </mrow>
      </mrow>
      <mrow>
        <mi>κ</mi>
        <mi>R</mi>
      </mrow>
    </mfrac>
    <mfrac>
      <mi>∂</mi>
      <mrow>
        <mi>∂</mi>
        <mi>R</mi>
      </mrow>
    </mfrac>
    <mrow>
      <mo stretchy="true" form="prefix">[</mo>
      <msup>
        <mi>R</mi>
        <mn>2</mn>
      </msup>
      <mfrac>
        <mrow>
          <mi>∂</mi>
          <msub>
            <mi>D</mi>
            <mi>n</mi>
          </msub>
          <mrow>
            <mo stretchy="true" form="prefix">(</mo>
            <mi>R</mi>
            <mo stretchy="true" form="postfix">)</mo>
          </mrow>
        </mrow>
        <mrow>
          <mi>∂</mi>
          <mi>R</mi>
        </mrow>
      </mfrac>
      <mo stretchy="true" form="postfix">]</mo>
    </mrow>
    <mspace width="0.167em" />
    <mi>d</mi>
    <mi>R</mi>
  </mrow>
</math>