<<< native
[ ESubsup (EIdentifier "x") (EIdentifier "b") (EIdentifier "a")
, ESpace (1 % 1)
, ESubsup (EIdentifier "x") (EIdentifier "b") (EIdentifier "a")
, ESpace (1 % 1)
, EUnder True (EMathOperator "min") (EIdentifier "A")
, ESpace (1 % 1)
, EUnder True (EMathOperator "max") (EIdentifier "B")
, ESpace (1 % 1)
, EUnder True (EMathOperator "det") (EIdentifier "C")
, ESpace (1 % 1)
, EUnder True (EMathOperator "Pr") (EIdentifier "A")
, ESpace (1 % 1)
, EUnder True (EMathOperator "gcd") (EIdentifier "A")
, ESpace (1 % 1)
, ESuper
    (EOver False (EIdentifier "u") (ESymbol Accent "\775"))
    (ENumber "2")
, ESpace (1 % 1)
, ESub
    (EOver False (EIdentifier "u") (ESymbol TOver "\175"))
    (EIdentifier "\949")
, ESpace (1 % 1)
, ESubsup
    (EUnder False (EIdentifier "u") (ESymbol TUnder "_"))
    (EIdentifier "b")
    (EIdentifier "a")
, ESpace (1 % 1)
, EOver
    False
    (EOver
       False
       (EGrouped [ EIdentifier "a" , ESymbol Bin "+" , EIdentifier "b" ])
       (ESymbol TOver "\9182"))
    (EText TextNormal "term")
, ESpace (1 % 1)
, EOver
    False
    (EOver
       False
       (EGrouped [ EIdentifier "a" , ESymbol Bin "+" , EIdentifier "b" ])
       (ESymbol TOver "\9140"))
    (EIdentifier "c")
, ESpace (1 % 1)
, EUnder
    False
    (EUnder
       False
       (EGrouped [ EIdentifier "a" , ESymbol Bin "+" , EIdentifier "b" ])
       (ESymbol TUnder "\9183"))
    (EIdentifier "c")
, ESpace (1 % 1)
, EUnder
    False
    (EUnder
       False
       (EGrouped [ EIdentifier "a" , ESymbol Bin "+" , EIdentifier "b" ])
       (ESymbol TUnder "\9141"))
    (EIdentifier "c")
, ESuper (ESpace (1 % 1)) (EIdentifier "H")
, EIdentifier "e"
, ENumber "3"
, ESub (ESpace (1 % 1)) (EIdentifier "x")
, EIdentifier "A"
, ESubsup (ESpace (1 % 1)) (EIdentifier "x") (ENumber "3")
]
>>> mml
<?xml version='1.0' ?>
<math display="block" xmlns="http://www.w3.org/1998/Math/MathML">
  <mrow>
    <msubsup>
      <mi>x</mi>
      <mi>b</mi>
      <mi>a</mi>
    </msubsup>
    <mspace width="1.0em" />
    <msubsup>
      <mi>x</mi>
      <mi>b</mi>
      <mi>a</mi>
    </msubsup>
    <mspace width="1.0em" />
    <munder>
      <mo>min</mo>
      <mi>A</mi>
    </munder>
    <mspace width="1.0em" />
    <munder>
      <mo>max</mo>
      <mi>B</mi>
    </munder>
    <mspace width="1.0em" />
    <munder>
      <mo>det</mo>
      <mi>C</mi>
    </munder>
    <mspace width="1.0em" />
    <munder>
      <mo>Pr</mo>
      <mi>A</mi>
    </munder>
    <mspace width="1.0em" />
    <munder>
      <mo>gcd</mo>
      <mi>A</mi>
    </munder>
    <mspace width="1.0em" />
    <msup>
      <mover>
        <mi>u</mi>
        <mo accent="true">̇</mo>
      </mover>
      <mn>2</mn>
    </msup>
    <mspace width="1.0em" />
    <msub>
      <mover>
        <mi>u</mi>
        <mo accent="true">¯</mo>
      </mover>
      <mi>ε</mi>
    </msub>
    <mspace width="1.0em" />
    <msubsup>
      <munder>
        <mi>u</mi>
        <mo accent="true">_</mo>
      </munder>
      <mi>b</mi>
      <mi>a</mi>
    </msubsup>
    <mspace width="1.0em" />
    <mover>
      <mover>
        <mrow>
          <mi>a</mi>
          <mo>+</mo>
          <mi>b</mi>
        </mrow>
        <mo accent="true">⏞</mo>
      </mover>
      <mtext mathvariant="normal">term</mtext>
    </mover>
    <mspace width="1.0em" />
    <mover>
      <mover>
        <mrow>
          <mi>a</mi>
          <mo>+</mo>
          <mi>b</mi>
        </mrow>
        <mo accent="true">⎴</mo>
      </mover>
      <mi>c</mi>
    </mover>
    <mspace width="1.0em" />
    <munder>
      <munder>
        <mrow>
          <mi>a</mi>
          <mo>+</mo>
          <mi>b</mi>
        </mrow>
        <mo accent="true">⏟</mo>
      </munder>
      <mi>c</mi>
    </munder>
    <mspace width="1.0em" />
    <munder>
      <munder>
        <mrow>
          <mi>a</mi>
          <mo>+</mo>
          <mi>b</mi>
        </mrow>
        <mo accent="true">⎵</mo>
      </munder>
      <mi>c</mi>
    </munder>
    <msup>
      <mspace width="1.0em" />
      <mi>H</mi>
    </msup>
    <mi>e</mi>
    <mn>3</mn>
    <msub>
      <mspace width="1.0em" />
      <mi>x</mi>
    </msub>
    <mi>A</mi>
    <msubsup>
      <mspace width="1.0em" />
      <mi>x</mi>
      <mn>3</mn>
    </msubsup>
  </mrow>
</math>