```
% pandoc -f rst -t native
+--------+----------------+
| 123456 | :math:`a + b`  |
+--------+----------------+
^D
[ Table
    ( "" , [] , [] )
    (Caption Nothing [])
    [ ( AlignDefault , ColWidth 0.125 )
    , ( AlignDefault , ColWidth 0.2361111111111111 )
    ]
    (TableHead ( "" , [] , [] ) [])
    [ TableBody
        ( "" , [] , [] )
        (RowHeadColumns 0)
        []
        [ Row
            ( "" , [] , [] )
            [ Cell
                ( "" , [] , [] )
                AlignDefault
                (RowSpan 1)
                (ColSpan 1)
                [ Plain [ Str "123456" ] ]
            , Cell
                ( "" , [] , [] )
                AlignDefault
                (RowSpan 1)
                (ColSpan 1)
                [ Plain [ Math InlineMath "a + b" ] ]
            ]
        ]
    ]
    (TableFoot ( "" , [] , [] ) [])
]
```