\startTEXpage[offset=10pt]

\startbuffer
$ y = \sqrt[3]{ x^2 + ax + b } $ \blank[medium]

$ y = \sqrt[3] { \frac{x^2 + ax + b }{d} } $
\stopbuffer

\getbuffer \blank

\setupmathradical[sqrt][alternative=normal,color=darkblue]

\getbuffer \blank

\setupmathradical[sqrt][alternative=mp,color=darkgreen]

\getbuffer

\stopTEXpage
