Automatic subdomains, how to correctly merge 2 pieces of .htaccess code?

Question

Apache HTTP Server

Hello. I shoveled a bunch of manuals, talked to technical support, as a result I have some idea, but still I need your help in bringing the .htaccess code to mind.
I am hosted on a virtual server - freehost.com.ua . Here is what they write for automatic subdomains - freehost.com.ua/faq/faq/kak-aktivirovat-optsiyu-ne... . Those. all folders in the root of the main domain become subdomains - nonsense! Technical support suggested that you can create a subdomains folder at the root and add subfolders to it, they will be subdomains. The option is what you need, here is their corrected version of the .htaccess code .

RewriteEngine On
RewriteCond %{ENV:REDIRECT_STATUS} !^$
RewriteRule .* - [L]

RewriteCond %{HTTP_HOST} !^www\.example\.com$
RewriteCond %{HTTP_HOST} ^([^.]*)\.example\.com$
RewriteCond %{REQUEST_URI} !^/subdomains
RewriteRule ^(.*)$ /subdomains/%1/$1 [QSA,L]

Now I will show my .htaccess lying in the root of the main domain.

#Устанавливаем кодировку сайта
AddDefaultCharset utf-8

#Переадресации при разных ошибках
ErrorDocument 403 http://example.com/
ErrorDocument 404 http://example.com/

#Скрываем содержимое папок
Options All -Indexes

#Включаем преобразование ссылок
RewriteEngine on

#Склеиваем www с основным доменом
RewriteCond %{HTTP_HOST} ^www.example.com$ [NC]
RewriteRule ^(.*)$ http://example.com/$1 [R=301,L]

#Склеиваем index.php с доменом
RewriteCond %{THE_REQUEST} ^[A-Z]{3,9}\ /index\.php\ HTTP/
RewriteRule ^index\.php$ / [R=301,L]

#Принудительная подстановка замыкающего слеша
RewriteCond %{REQUEST_URI} /+[^\.]+$
RewriteRule ^(.+[^/])$ %{REQUEST_URI}/ [R=301,L]

#Ловим переменные из урл
RewriteRule ^(.*)(\/|\.html)$ index.php?data=$1&last=$2 [L,QSA]

How now to correctly combine 2 pieces of code so that everything works without errors? Maybe my code and the technical support code is not quite correct, then I ask you to help me fix it. Thank you.