Sites like Gdz.ru or Reshak.ru sometimes host answers for specific authors, though you should verify the year of publication (e.g., 2019-2022 versions).
Русский язык 8 класс часть 2 Быстрова 2019-2022 г. russkii iazyk 8 klassa avtor e.a bystrova n v mangutova gdz
Searching for ready-made "GDZ" (готовые домашние задания) for the 8th-grade Russian textbook by (published by "Russkoe Slovo") can be tricky because this specific edition is often used in schools with a focus on national-regional components or specific educational programs. Sites like Gdz
Since you requested a "piece" or example, here is a general breakdown of how to approach a typical 8th-grade task from this curriculum, such as analyzing or Sentences with Homogeneous Members : Example Analysis: Homogeneous Members of a Sentence russkii iazyk 8 klassa avtor e.a bystrova n v mangutova gdz