Removing string and date from url with htaccess and rewrite rules - apache

Question

I would like to replace some parts of my url, year-month and also .html url extension.
Basically i want this ( old url )
https://olddomain.com/weblog/archives/2016/06/post-name-example.html
to redirected to
https://newdomain.com/post-name-example/
this url. I have searched stackoverflow and many other sites, tried mixing different answers from different people together. Tried writing my own rules but i couldn't pull it off. Any help would be much appreaciated. Thank you.
I tried this to remove .html extension
#1)redirect /file.html to /file
RewriteCond %{THE_REQUEST} /([^.]+)\.html [NC]
RewriteRule ^ /%1 [NE,L,R]
This to remove date format from url
# REMOVE DATE FROM WP POST PERMALINKS
RedirectMatch 301 ^/wordpress/([0-9]+)/([0-9]+)/([0-9]+)/(.*)$ http://example.com/$4
http://example.com/wordpress/2012/04/12/post-name/
..to elegance:
http://example.com/post-name/
My htaccess file is like this
<IfModule mod_rewrite.c>
RewriteEngine On
RewriteRule ^weblog/archives/[0-9]{4}/[0-9]{2}/(.*)\.html$ https://newdomain.com/$1/ [R=301.L]
RewriteRule ^index\.php$ - [L]
RewriteCond %{REQUEST_FILENAME} !-f
RewriteCond %{REQUEST_FILENAME} !-d
RewriteRule . /index.php [L]
</IfModule>
This worked properly if anybody needs it in the future:
<IfModule mod_rewrite.c>
RewriteEngine On
RewriteRule ^weblog/archives/[0-9]{4}/[0-9]{2}/([^.]+)\.html$ http://www.newdomain.com/$1/ [L,R=301]
RewriteRule ^index\.php$ - [L]
RewriteCond %{REQUEST_FILENAME} !-f
RewriteCond %{REQUEST_FILENAME} !-d
RewriteRule . /index.php [L]
</IfModule>