<<< native
[ EText TextNormal "Inline, display style, thick line\160"
, EFraction
    NormalFrac
    (EGrouped [ EIdentifier "x" , ESymbol Bin "-" , ENumber "1" ])
    (EGrouped
       [ EGrouped
           [ ENumber "0.98"
           , ESymbol Bin "\215"
           , ESuper (ENumber "10") (ENumber "2")
           ]
       , ESymbol Bin "+"
       , EIdentifier "y"
       ])
, EText TextNormal ", the superscripted 2 should be script size."
]
>>> tex
\text{Inline, display style, thick line~}\frac{x - 1}{{0.98 \times 10^{2}} + y}\text{, the superscripted 2 should be script size.}