mrootB1.test

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

<math xmlns="http://www.w3.org/1998/Math/MathML">
  <mrow>
    <mroot>
      <mn>3</mn> 
      <mrow>
        <mi>x</mi> 
        <mo>-</mo> 
        <mn>3</mn> 
      </mrow> 
    </mroot> 
    <mo>+</mo> 
    <mroot>
      <mn>3</mn> 
      <mi>x</mi> 
    </mroot> 
    <mo>+</mo> 
    <mroot>
      <mfrac>
        <mroot>
          <mrow>
            <mn>3</mn> 
            <mi>x</mi> 
          </mrow> 
          <mn>3</mn> 
        </mroot> 
        <mrow>
          <mi>x</mi> 
          <mo>-</mo> 
          <mn>3</mn> 
        </mrow> 
      </mfrac> 
      <mfrac>
        <mn>3</mn> 
        <mn>2</mn> 
      </mfrac> 
    </mroot> 
  </mrow> </math>
>>> native
[ ERoot
    (EGrouped [ EIdentifier "x" , ESymbol Bin "-" , ENumber "3" ])
    (ENumber "3")
, ESymbol Bin "+"
, ERoot (EIdentifier "x") (ENumber "3")
, ESymbol Bin "+"
, ERoot
    (EFraction NormalFrac (ENumber "3") (ENumber "2"))
    (EFraction
       NormalFrac
       (ERoot (ENumber "3") (EGrouped [ ENumber "3" , EIdentifier "x" ]))
       (EGrouped [ EIdentifier "x" , ESymbol Bin "-" , ENumber "3" ]))
]