stretchTable1.test

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

<math xmlns="http://www.w3.org/1998/Math/MathML">
  <mrow>
    <mtable>
      <mtr>
        <mtd>
          <mn>1</mn> 
        </mtd> 
        <mtd>
          <mo>&#x2192;</mo> 
        </mtd> 
        <mtd>
          <mn>2</mn> 
        </mtd> 
      </mtr> 
      <mtr>
        <mtd>
          <mo>&#x2193;</mo> 
        </mtd> 
        <mtd>
          <mi>x</mi> 
          <mo>+</mo> 
          <mfrac>
            <mrow>
              <mn>2</mn> 
            </mrow> 
            <mrow>
              <msup>
                <mrow>
                  <mi>y</mi> 
                </mrow> 
                <mrow>
                  <mn>3</mn> 
                </mrow> 
              </msup> 
            </mrow> 
          </mfrac> 
        </mtd> 
        <mtd>
          <mo>&#x2193;</mo> 
        </mtd> 
      </mtr> 
      <mtr>
        <mtd>
          <mn>3</mn> 
        </mtd> 
        <mtd>
          <mo>&#x2192;</mo> 
        </mtd> 
        <mtd>
          <mn>4</mn> 
        </mtd> 
      </mtr> 
    </mtable> 
  </mrow> </math>
>>> native
[ EArray
    [ AlignCenter , AlignCenter , AlignCenter ]
    [ [ [ ENumber "1" ]
      , [ ESymbol Accent "\8594" ]
      , [ ENumber "2" ]
      ]
    , [ [ ESymbol Rel "\8595" ]
      , [ EGrouped
            [ EIdentifier "x"
            , ESymbol Bin "+"
            , EFraction
                NormalFrac (ENumber "2") (ESuper (EIdentifier "y") (ENumber "3"))
            ]
        ]
      , [ ESymbol Rel "\8595" ]
      ]
    , [ [ ENumber "3" ]
      , [ ESymbol Accent "\8594" ]
      , [ ENumber "4" ]
      ]
    ]
]