left associative with precedence 55
for @{ 'compose $a $b }.
+notation "hvbox(U break ↓ V)" non associative with precedence 80 for @{ 'fintersects $U $V }.
+
notation "(a \sup b)" left associative with precedence 60 for @{ 'exp $a $b}.
notation "s \sup (-1)" with precedence 60 for @{ 'invert $s }.
notation < "s \sup (-1) x" with precedence 60 for @{ 'invert_appl $s $x}.