301 redict from any nesting, how?

Question

htaccess

Good afternoon.
Please tell me how to implement a 301 redict from any nesting to without it. For example:
1. site/elektroinstrument/kategorii/perforatory/perforator-m12-ch-202c/ to site/perforator-m12-ch-202c/
2. site/rezak-dlya-plastikovyh-trub/ to site/rezak-dlya- plastikovyh-trub/ (i.e. if there is no nesting, then leave)
3. website/rezaki/rezak-dlya-plastikovyh-trub.html to website/rezak-dlya-plastikovyh-trub
/ remove any nesting and if it ends with .html, then change to /

Answer 1

#  если минимум 1 символ до последнего конца строки, и убираем слеш еслион есть.
RewriteCond %{REQUEST_URI} .*(/.+)(|/)$
# то пенренаправить все  на сайт и то что в скобках.
RewriteRule ^(.*)$ http://site.ru%1 [R=301,L]

We get
Although of course you would do well to work with "greedy quantifiers"
there is something to improve here.
Now remove .htnl

RewriteCond %{REQUEST_URI} ^(.+)\.html$
RewriteRule ^(.*)$ %1/ [R=301,L]