RewriteEngine On +FollowSymlinks
RewriteCond %{REQUEST_FILENAME} !-f
RewriteCond %{REQUEST_FILENAME} !-d

RewriteRule ^([0-9]+)/$ /$1? [R=301,L]
RewriteCond %{HTTP_HOST} ^example.com
RewriteRule (.*) http://www.example.com/$1 [R=301,L]

RewriteRule ^amixermusic/escuchar/(.+) /amixermusic/escuchar.php?id=$1
RewriteRule ^amixermusic/buscar/([^/]*)/?(.*) /amixermusic/index.php?q=$1&p=$2

RewriteCond %{QUERY_STRING} fb_action_ids=.*$
RewriteRule .* %{REQUEST_URI}? [R=301,L]

RewriteCond %{QUERY_STRING} fb_comment_id=.*$
RewriteRule .* %{REQUEST_URI}? [R=301,L]

RewriteCond %{QUERY_STRING} fb_(action|comment)_id