<<< native
[ EText TextNormal "Inline up arrows, display style, no line\160"
, EDelimited
    ""
    ""
    [ Left "\8593"
    , Right
        (EFraction
           NormalFrac
           (EGrouped
              [ EMathOperator "sin" , ESymbol Ord "\8289" , EIdentifier "\952" ])
           (EIdentifier "M"))
    , Left "\8593"
    ]
, EText TextNormal "\160the end."
]
>>> eqn
roman "Inline up arrows, display style, no line " left "" "↑" {sin  theta} over M "↑" right "" roman " the end."