<<< native
[ EDelimited
    "("
    ")"
    [ Right
        (EArray
           [ AlignCenter , AlignCenter ]
           [ [ [ EGrouped [ ENumber "12" , EIdentifier "x" ] ]
             , [ ENumber "0" ]
             ]
           , [ [ ENumber "0" ] , [ ENumber "117" ] ]
           ])
    ]
]
>>> omml
<?xml version='1.0' ?>
<m:oMathPara>
  <m:oMathParaPr>
    <m:jc m:val="center" />
  </m:oMathParaPr>
  <m:oMath>
    <m:d>
      <m:dPr>
        <m:begChr m:val="(" />
        <m:endChr m:val=")" />
        <m:sepChr m:val="" />
        <m:grow />
      </m:dPr>
      <m:e>
        <m:m>
          <m:mPr>
            <m:baseJc m:val="center" />
            <m:plcHide m:val="1" />
            <m:mcs>
              <m:mc>
                <m:mcPr>
                  <m:mcJc m:val="center" />
                  <m:count m:val="1" />
                </m:mcPr>
              </m:mc>
              <m:mc>
                <m:mcPr>
                  <m:mcJc m:val="center" />
                  <m:count m:val="1" />
                </m:mcPr>
              </m:mc>
            </m:mcs>
          </m:mPr>
          <m:mr>
            <m:e>
              <m:r>
                <m:t>12</m:t>
              </m:r>
              <m:r>
                <m:t>x</m:t>
              </m:r>
            </m:e>
            <m:e>
              <m:r>
                <m:t>0</m:t>
              </m:r>
            </m:e>
          </m:mr>
          <m:mr>
            <m:e>
              <m:r>
                <m:t>0</m:t>
              </m:r>
            </m:e>
            <m:e>
              <m:r>
                <m:t>117</m:t>
              </m:r>
            </m:e>
          </m:mr>
        </m:m>
      </m:e>
    </m:d>
  </m:oMath>
</m:oMathPara>