$  perl -e '
> my $sh_command = "(
> echo foo
> echo bar
> echo baz
> )";
> exec $sh_command;
> '
foo
bar
baz

##</code><code>##

$ perl -e '
> exec "(
> echo foo
> echo bar
> echo baz
> )";
> '
foo
bar
baz

##</code><code>##

$ perl -e '
>  exec "(
> echo bar
> echo bar
> echo baz
>  ) | wc
> ";
> '
      3       3      12