```ocaml
# (+);;
- : int -> int -> int = <fun>
# (-);;
- : int -> int -> int = <fun>
# (+.);;
- : float -> float -> float = <fun>
# (/.);;
- : float -> float -> float = <fun>
# (&&);;
- : bool -> bool -> bool = <fun>
# (||);;
- : bool -> bool -> bool = <fun>
```