How to 301 Redirect All old URLs to my main domain in Wordpress?

http://www.domain.com/forums/95-my-forum-name
http://www.domain.com/threads/6236-my-thread-name
..........................
and 
http://www.domain.com/forum.php

http://www.domain.com/forums/95-my-forum-name  ->  http://www.domain.com
http://www.domain.com/threads/6236-my-thread-name ->  http://www.domain.com
..........................
and 
http://www.domain.com/forum.php ->  http://www.domain.com/forum/

RewriteRule ^forums\/(.+) http://www.domain.com [R=301,L]
RewriteRule ^threads\/(.+) http://www.domain.com [R=301,L]
RewriteRule ^forum.php http://www.domain.com/forum/ [R=301,L]

# BEGIN WordPress
<IfModule mod_rewrite.c>
RewriteEngine On
RewriteBase /
RewriteRule ^forums\/(.+) http://www.domain.com [R=301,L]
RewriteRule ^threads\/(.+) http://www.domain.com [R=301,L]
RewriteRule ^forum.php http://www.domain.com/forum/ [R=301,L]
RewriteRule ^index\.php$ - [L]
RewriteCond %{REQUEST_FILENAME} !-f
RewriteCond %{REQUEST_FILENAME} !-d
RewriteRule . /index.php [L]
</IfModule>
# END WordPress