texmath-0.12.5: test/writer/mml/mrootB1.test

<<< 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" ]))
]
>>> mml
<?xml version='1.0' ?>
<math display="block" 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>