if you can't use a variable, then you have to use a literal
    = 23         // literal int
    = 34.56      // literal real
    = "cat"      // literal string
    = {1,2,3}    // literal array (Java)
    = [1,2,3]    // literal list (ML)


    [1,2,3] = 1 :: 2 :: 3 :: []
    ["cat", "dog"] = "cat" :: "dog" :: []
    [1.2, 3.4, 4.5] = 1.2 :: 3.4 :: []

    [] : 'a list


    double f(int x,  double y, String z)
    {
    }

    param1 -> param2 -> param3 -> return type
       int -> double -> string -> double


    double f(int x,  type h, String z)
    {
         h( 5 )
    }

    int -> (string->int) -> (int->int) -> string


a b   (* ML function application, call a with argument b *)

f(((5)))         // Java
f( ((5)) )       // Java
f((((((5))))))   // ML
f 5              // ML


3+2
(((((((3))))))+(2))  // unneeded grouping