regex question

lepetitalbert has asked for the wisdom of the Perl Monks concerning the following question:

Hello Monks,

I'm trying to write this :

$var =~ s/\(//;
$var =~ s/\)//;
[download]

in one line. I thought it'll be :

$var =~ s/[\(\)]//;
[download]

but this only remove the left one.

Thanks.

Have a nice day.