Changes

Equation ~(\in[eq:v]) tells the final velocity after time ~$t$ and equation ~(\in[eq:h]) tells the distance travelled in time ~$t$.

The numbering can be changed to a subformula style using {{cmd|placesubformula}} instead of {{cmd|placeformula}} and numbering the subformulas using {{cmd|NR|2=[+][a]}}, {{cmd|NR|2=[+][b]}}, … instead: <context source=yes>\setuplayout[scale=0.8,width=13cm]\placesubformula \startformula \startalign \NC v \NC = u + at \NR[+][eq:v] \NC h \NC = ut + \frac12 gt^2 \NR[+][eq:h]\stopalign \stopformula Equation~(\in[eq:v]) tells the final velocity after time~$t$ and equation (\in[eq:h]) tells the distance travelled in time~$t$.</context>