<<< native
[ EArray
    [ AlignCenter
    , AlignCenter
    , AlignCenter
    , AlignCenter
    , AlignCenter
    ]
    [ [ []
      , []
      , [ EText TextNormal "symm" ]
      , [ EText TextNormal "stretch" ]
      , [ EText TextNormal "symm/stretch" ]
      ]
    , [ [ EText TextNormal "small op" ]
      , [ EGrouped [ ESymbol Op "\8747" , EIdentifier "x" ] ]
      , [ EGrouped [ ESymbol Op "\8747" , EIdentifier "x" ] ]
      , [ EDelimited "\8747" "" [ Right (EIdentifier "x") ] ]
      , [ EDelimited "\8747" "" [ Right (EIdentifier "x") ] ]
      ]
    , [ [ EText TextNormal "large op" ]
      , [ EGrouped [ ESymbol Op "\8747" , EIdentifier "x" ] ]
      , [ EGrouped [ ESymbol Op "\8747" , EIdentifier "x" ] ]
      , [ EDelimited "\8747" "" [ Right (EIdentifier "x") ] ]
      , [ EDelimited "\8747" "" [ Right (EIdentifier "x") ] ]
      ]
    , [ [ EText TextNormal "small op" ]
      , [ EGrouped
            [ ESymbol Op "\8747"
            , EFraction NormalFrac (EIdentifier "x") (EIdentifier "y")
            ]
        ]
      , [ EGrouped
            [ ESymbol Op "\8747"
            , EFraction NormalFrac (EIdentifier "x") (EIdentifier "y")
            ]
        ]
      , [ EDelimited
            "\8747"
            ""
            [ Right (EFraction NormalFrac (EIdentifier "x") (EIdentifier "y"))
            ]
        ]
      , [ EDelimited
            "\8747"
            ""
            [ Right (EFraction NormalFrac (EIdentifier "x") (EIdentifier "y"))
            ]
        ]
      ]
    , [ [ EText TextNormal "large op" ]
      , [ EGrouped
            [ ESymbol Op "\8747"
            , EFraction NormalFrac (EIdentifier "x") (EIdentifier "y")
            ]
        ]
      , [ EGrouped
            [ ESymbol Op "\8747"
            , EFraction NormalFrac (EIdentifier "x") (EIdentifier "y")
            ]
        ]
      , [ EDelimited
            "\8747"
            ""
            [ Right (EFraction NormalFrac (EIdentifier "x") (EIdentifier "y"))
            ]
        ]
      , [ EDelimited
            "\8747"
            ""
            [ Right (EFraction NormalFrac (EIdentifier "x") (EIdentifier "y"))
            ]
        ]
      ]
    ]
]
>>> tex
\begin{matrix}
 & & \text{symm} & \text{stretch} & \text{symm/stretch} \\
\text{small op} & {\int x} & {\int x} & \left. \int x \right. & \left. \int x \right. \\
\text{large op} & {\int x} & {\int x} & \left. \int x \right. & \left. \int x \right. \\
\text{small op} & {\int\frac{x}{y}} & {\int\frac{x}{y}} & \left. \int\frac{x}{y} \right. & \left. \int\frac{x}{y} \right. \\
\text{large op} & {\int\frac{x}{y}} & {\int\frac{x}{y}} & \left. \int\frac{x}{y} \right. & \left. \int\frac{x}{y} \right.
\end{matrix}