How to add exception to 301 redirect?

Question

URL Handling

Good afternoon!
The site has a 301 redirect set up to no www and no slash "/".
But with this setting, the Bitrix admin panel stopped opening: mysite.ru/bitrix/admin
Here is the code I use:

RewriteCond %{REQUEST_URI} ^\/$
RewriteCond %{HTTP_HOST} ^www\.(.*)$
RewriteRule ^(.*)$ http://%1/$1 [L,R=301]
RewriteCond %{REQUEST_URI} !\?
RewriteCond %{REQUEST_URI} !\&
RewriteCond %{REQUEST_URI} !\=
RewriteCond %{REQUEST_URI} !\.
RewriteCond %{REQUEST_URI} \/$
RewriteCond %{HTTP_HOST} ^www\.(.*)$
RewriteRule ^(.*)\/$ http://%1/$1 [L,R=301]
RewriteCond %{REQUEST_URI } !\?
RewriteCond %{REQUEST_URI} !\&
RewriteCond %{REQUEST_URI} !\=
RewriteCond %{REQUEST_URI} !\.
RewriteCond %{REQUEST_URI} !\/$
RewriteCond %{HTTP_HOST} ^www\.(.*)$
RewriteRule ^(.*)$ http://%1/$1[L,R=301]
RewriteCond %{REQUEST_URI} !\?
RewriteCond %{REQUEST_URI} !\&
RewriteCond %{REQUEST_URI} !\=
RewriteCond %{REQUEST_URI} !\.
RewriteCond %{REQUEST_URI} \/$
RewriteCond %{HTTP_HOST} ^([^www].*)$
RewriteRule ^(.*)\/$ http://%1/$1 [L,R=301]

Help here to add an exception for the Bitrix admin panel

Answer 1

RewriteCond %{REQUEST_URI} ^\/$
RewriteCond %{HTTP_HOST} ^www\.(.*)$
RewriteRule ^(.*)$ http://%1/$1 [L,R=301]
RewriteCond %{REQUEST_URI} !\?
RewriteCond %{REQUEST_URI} !\&
RewriteCond %{REQUEST_URI} !\=
RewriteCond %{REQUEST_URI} !\.
RewriteCond %{REQUEST_URI} \/$
RewriteCond %{HTTP_HOST} ^www\.(.*)$
RewriteRule ^(.*)\/$ http://%1/$1 [L,R=301]
RewriteCond %{REQUEST_URI } !\?
RewriteCond %{REQUEST_URI} !\&
RewriteCond %{REQUEST_URI} !\=
RewriteCond %{REQUEST_URI} !\.
RewriteCond %{REQUEST_URI} !\/$
RewriteCond %{HTTP_HOST} ^www\.(.*)$
RewriteRule ^(.*)$ http://%1/$1[L,R=301]
RewriteCond %{REQUEST_URI} !\?
RewriteCond %{REQUEST_URI} !\&
RewriteCond %{REQUEST_URI} !\=
RewriteCond %{REQUEST_URI} !\.
RewriteCond %{REQUEST_URI} \/$
RewriteCond %{HTTP_HOST} ^([^www].*)$
RewriteRule ^(.*)\/$ http://%1/$1 [L,R=301]

Replaced by

RewriteCond %{REQUEST_FILENAME} !-d
RewriteCond %{HTTP_HOST} ^(?:www\.|)(.+) [NC]
RewriteRule ^(.*)/$ http://%1/$1 [R=301,L]

RewriteCond %{HTTP_HOST} ^www\.(.+) [NC]
RewriteRule ^(.*)$ http://%1/$1 [R=301,L]