note MeowChow This problem is trickier than it seems: <code> print rpn2ltr qw(2 3 4 + -); # output : 2 - 3 + 4 # should be : 2 - (3 + 4) </code> <pre> <a href="/index.pl?node=MeowChow"> MeowChow </a> s aamecha.s a..a\u$&owag.print</pre> 81969 81995