<<< native
[ EArray
    [ AlignCenter , AlignCenter ]
    [ [ [ EText TextNormal "displaystyle: false largeop: false" ]
      , [ EGrouped
            [ ESymbol Op "\8896"
            , ESymbol Op "\8897"
            , ESymbol Op "\8747"
            , ESymbol Op "\8721"
            , ESymbol Op "\8719"
            , ESymbol Op "\8899"
            , ESymbol Op "\8898"
            ]
        ]
      ]
    , [ [ EText TextNormal "displaystyle: false largeop: true" ]
      , [ EGrouped
            [ ESymbol Op "\8896"
            , ESymbol Op "\8897"
            , ESymbol Op "\8747"
            , ESymbol Op "\8721"
            , ESymbol Op "\8719"
            , ESymbol Op "\8899"
            , ESymbol Op "\8898"
            ]
        ]
      ]
    , [ [ EText TextNormal "displaystyle: true largeop: false" ]
      , [ EGrouped
            [ ESymbol Op "\8896"
            , ESymbol Op "\8897"
            , ESymbol Op "\8747"
            , ESymbol Op "\8721"
            , ESymbol Op "\8719"
            , ESymbol Op "\8899"
            , ESymbol Op "\8898"
            ]
        ]
      ]
    , [ [ EText TextNormal "displaystyle: true largeop: true" ]
      , [ EGrouped
            [ ESymbol Op "\8896"
            , ESymbol Op "\8897"
            , ESymbol Op "\8747"
            , ESymbol Op "\8721"
            , ESymbol Op "\8719"
            , ESymbol Op "\8899"
            , ESymbol Op "\8898"
            ]
        ]
      ]
    , [ [ EText TextNormal "displaystyle: false largeop: default" ]
      , [ EGrouped
            [ ESymbol Op "\8896"
            , ESymbol Op "\8897"
            , ESymbol Op "\8747"
            , ESymbol Op "\8721"
            , ESymbol Op "\8719"
            , ESymbol Op "\8899"
            , ESymbol Op "\8898"
            ]
        ]
      ]
    , [ [ EText TextNormal "displaystyle: true largeop: default" ]
      , [ EGrouped
            [ ESymbol Op "\8896"
            , ESymbol Op "\8897"
            , ESymbol Op "\8747"
            , ESymbol Op "\8721"
            , ESymbol Op "\8719"
            , ESymbol Op "\8899"
            , ESymbol Op "\8898"
            ]
        ]
      ]
    ]
]
>>> eqn
matrix{
ccol{ {roman "displaystyle: false largeop: false"} above {roman "displaystyle: false largeop: true"} above {roman "displaystyle: true largeop: false"} above {roman "displaystyle: true largeop: true"} above {roman "displaystyle: false largeop: default"} above {roman "displaystyle: true largeop: default"} }
ccol{ {\[u22C0] \[u22C1] int sum prod inter union} above {\[u22C0] \[u22C1] int sum prod inter union} above {\[u22C0] \[u22C1] int sum prod inter union} above {\[u22C0] \[u22C1] int sum prod inter union} above {\[u22C0] \[u22C1] int sum prod inter union} above {\[u22C0] \[u22C1] int sum prod inter union} }
}