Sites like 11klasov.net and community groups on VK offer PDF and DJVU versions of both the Basic and Advanced (Profile) levels.

Provides online solutions for the 2015 edition and newer on GDZ.ru .

The textbook by Ivan Novoshinskii and Nina Novoshinskaya is available online in several formats.

The textbook is also hosted on ibooks.ru for authorized educational users. ✍️ Solutions and GDZ

Depending on whether you need to read the full text or check answers, you can use the following resources: 📖 Read or Download the Textbook