<<< native
[ EIdentifier "A"
, ESymbol Bin "+"
, EIdentifier "A"
, EPhantom (ESymbol Bin "+")
, EIdentifier "A"
]
>>> omml
<?xml version='1.0' ?>
<m:oMathPara>
  <m:oMathParaPr>
    <m:jc m:val="center" />
  </m:oMathParaPr>
  <m:oMath>
    <m:r>
      <m:t>A</m:t>
    </m:r>
    <m:r>
      <m:rPr>
        <m:sty m:val="p" />
      </m:rPr>
      <m:t>+</m:t>
    </m:r>
    <m:r>
      <m:t>A</m:t>
    </m:r>
    <m:phant>
      <m:phantPr>
        <m:show m:val="0" />
      </m:phantPr>
      <m:e>
        <m:r>
          <m:rPr>
            <m:sty m:val="p" />
          </m:rPr>
          <m:t>+</m:t>
        </m:r>
      </m:e>
    </m:phant>
    <m:r>
      <m:t>A</m:t>
    </m:r>
  </m:oMath>
</m:oMathPara>