% posted by WS on mailing list

\defineseparatorset[formulaprefix][][+]
\defineseparatorset[formulanumber][][-]

\setupformulas
  [prefixseparatorset=formulaprefix,
   numberseparatorset=formulanumber,
   prefixconnector=?,
   prefixsegments=1:*]

\starttext

\chapter{Formulas}

\section{Indeed}

\startplaceformula
	\startformula
        c^2 = a^2 + b^2
	\stopformula
\stopplaceformula

\stoptext
