%+ add %+ mul 2 3 4
runes nest with no brackets.
the inner call runs first.
this crammed one-line form is legal but hard to read — real hoon is tall.
glossary
%+ calls a gate that takes two arguments.
%+(add 2 3) is 5.
irregular forms:
(gate a b) is %+(gate a b)
add sums two atoms.
(add 2 3) is 5.
mul multiplies two atoms.
(mul 3 4) is 12.