(seq
  (def + builtins.math.add)
  (def - builtins.math.sub)
  (def * builtins.math.mul)
  (def / builtins.math.div)
  (def % builtins.math.mod)
  (def ** builtins.math.pow)

  (fn ++ <Number>[<Number>x]
    (+ x 1))

  (fn -- <Number>[<Number>x]
    (- x 1))
)