nested ok: true
grouped mc: builds (graceful)
error ok: gather -> KaTeX parse error: \multicolumn is not supported in the {gather} environmen
error ok: split -> KaTeX parse error: \multicolumn is not supported in the {split} environment
error ok: alignat -> KaTeX parse error: \multicolumn is not supported in the {alignat} environme
error ok: align -> KaTeX parse error: \multicolumn is not supported in the {align} environment
error ok: equation -> KaTeX parse error: \multicolumn is not supported in the {equation} environm
error ok: CD -> KaTeX parse error: \multicolumn is not supported in the {CD} environment at
aligned trailing mc: builds
cases exceed error ok -> KaTeX parse error: \multicolumn spans 2 columns, but only 1 column(s) remai
rcases full-span: builds
hlines + mc: builds
