<<< native
[ EText TextNormal "Inline down arrows, text style, no line\160"
, EDelimited
    ""
    ""
    [ Left "\8595"
    , Right
        (EFraction
           NormalFrac
           (EGrouped
              [ EMathOperator "sin" , ESymbol Ord "\8289" , EIdentifier "\952" ])
           (EIdentifier "M"))
    , Left "\8595"
    ]
, EText TextNormal "\160the end."
]
>>> tex
\text{Inline down arrows, text style, no line~}\left. \downarrow\frac{\sin\theta}{M}\downarrow \right.\text{~the end.}