Math/fractions
Fractions, Binomials, genfrac, continued fractions
Binomials
Binomials: Wolfgang explains (ntg-context list, 2011-12-04): Instead if \choose you can use \binom which is the recommended way in context. The \dbinom command sets the content in display style while \tbinom use textstyle.
\starttext Using \tex{binom} in text $\binom{n}{\frac{n}{2}}$. Using \tex{dbinom} in text $\dbinom{n}{\frac{n}{2}}$. Using \tex{tbinom} in text $\tbinom{n}{\frac{n}{2}}$. \startformula \binom{n}{\frac{n}{2}} \stopformula \stoptext