\providecommand*{\intervaloc}[2]{ \left({#1},{#2}\right] } % open-closed
\providecommand*{\intervalco}[2]{ \left[{#1},{#2}\right) } % closed-open
\providecommand*{\intervalcc}[2]{ \left[{#1},{#2}\right] } % closed-closed
\providecommand*{\intervaloc}[2]{ \left({#1},{#2}\right] } % open-closed
\providecommand*{\intervalco}[2]{ \left[{#1},{#2}\right) } % closed-open
\providecommand*{\intervalcc}[2]{ \left[{#1},{#2}\right] } % closed-closed