<<< native
[ EArray
    [ AlignCenter ]
    [ [ [ EGrouped
            [ EIdentifier "A" , ESymbol Rel "=" , EIdentifier "A" ]
        ]
      ]
    , [ [ EGrouped
            [ EIdentifier "\119808"
            , ESymbol Rel "="
            , EStyled TextBold [ EIdentifier "A" ]
            ]
        ]
      ]
    , [ [ EGrouped
            [ EIdentifier "\119860"
            , ESymbol Rel "="
            , EStyled TextItalic [ EIdentifier "A" ]
            ]
        ]
      ]
    , [ [ EGrouped
            [ EIdentifier "\119912"
            , ESymbol Rel "="
            , EStyled TextBoldItalic [ EIdentifier "A" ]
            ]
        ]
      ]
    , [ [ EGrouped
            [ EIdentifier "\120120"
            , ESymbol Rel "="
            , EStyled TextDoubleStruck [ EIdentifier "A" ]
            , ESymbol Rel "="
            , EIdentifier "\120120"
            ]
        ]
      ]
    , [ [ EGrouped
            [ EIdentifier "\119964"
            , ESymbol Rel "="
            , EStyled TextScript [ EIdentifier "A" ]
            , ESymbol Rel "="
            , EIdentifier "\119964"
            ]
        ]
      ]
    , [ [ EGrouped
            [ EIdentifier "\120016"
            , ESymbol Rel "="
            , EStyled TextBoldScript [ EIdentifier "A" ]
            ]
        ]
      ]
    , [ [ EGrouped
            [ EIdentifier "\120068"
            , ESymbol Rel "="
            , EStyled TextFraktur [ EIdentifier "A" ]
            , ESymbol Rel "="
            , EIdentifier "\120068"
            ]
        ]
      ]
    , [ [ EGrouped
            [ EIdentifier "\120172"
            , ESymbol Rel "="
            , EStyled TextBoldFraktur [ EIdentifier "A" ]
            ]
        ]
      ]
    , [ [ EGrouped
            [ EIdentifier "\120224"
            , ESymbol Rel "="
            , EStyled TextSansSerif [ EIdentifier "A" ]
            ]
        ]
      ]
    , [ [ EGrouped
            [ EIdentifier "\120276"
            , ESymbol Rel "="
            , EStyled TextSansSerifBold [ EIdentifier "A" ]
            ]
        ]
      ]
    , [ [ EGrouped
            [ EIdentifier "\120328"
            , ESymbol Rel "="
            , EStyled TextSansSerifItalic [ EIdentifier "A" ]
            ]
        ]
      ]
    , [ [ EGrouped
            [ EIdentifier "\120380"
            , ESymbol Rel "="
            , EStyled TextSansSerifBoldItalic [ EIdentifier "A" ]
            ]
        ]
      ]
    , [ [ EGrouped
            [ EIdentifier "\120432"
            , ESymbol Rel "="
            , EStyled TextMonospace [ EIdentifier "A" ]
            ]
        ]
      ]
    ]
]
>>> tex
\begin{matrix}
{A = A} \\
{\mathbf{A} = \mathbf{A}} \\
{A = \mathit{A}} \\
{{\mathbf{A}} = \mathbf{A}} \\
{{\mathbb{A}} = \mathbb{A} = {\mathbb{A}}} \\
{\mathcal{A} = \mathcal{A} = \mathcal{A}} \\
{{\mathcal{A}} = \mathcal{A}} \\
{{\mathfrak{A}} = \mathfrak{A} = {\mathfrak{A}}} \\
{{\mathfrak{A}} = \mathfrak{A}} \\
{\mathsf{A} = \mathsf{A}} \\
{{\mathbf{A}} = \mathbf{A}} \\
{{\mathsf{A}} = \mathsf{A}} \\
{{\mathbf{A}} = \mathbf{A}} \\
{\mathtt{A} = \mathtt{A}}
\end{matrix}