<<< native
[ EText TextNormal "Inline, text style, thick line\160"
, EGrouped
    [ EFraction
        NormalFrac
        (EGrouped
           [ ESuper (EIdentifier "x") (ENumber "2")
           , ESymbol Bin "+"
           , ENumber "1"
           ])
        (EIdentifier "x")
    , EFraction
        NormalFrac
        (EGrouped
           [ ESuper (EIdentifier "x") (ENumber "2")
           , ESymbol Bin "+"
           , ENumber "1"
           ])
        (EIdentifier "x")
    ]
, EText TextNormal "\160the end."
]
>>> tex
\text{Inline, text style, thick line~}{\frac{x^{2} + 1}{x}\frac{x^{2} + 1}{x}}\text{~the end.}