\setupbodyfont[70pt]
\starttext
\startTEXpage
\framed{$a >> n = \left\lfloor\frac{a}{2^n}\right\rfloor$}
\stopTEXpage
\stoptext

It works in MkIV, but it has the right margin cut with LMTX. Also, both MkIV and LMTX give cropped formulas when \framed is absent in the example above. Thank you in advance for any feedback.

Best regards,

Jairo :)