use v5.14;
use warnings;
use strict;

sub my_say()
{
  say $_[0] || "No arguments!";
}

say (1+2)*3; # Same as (say(1+2))*3;
say+(1+2)*3; # Same as say((1+2)*3);
my_say+(1+2)*3; # Same as my_say()+(1+2)*3;