Many versions include not just the final answer but also the logic behind spelling choices and punctuation marks.
Complex sentence structures and punctuation rules. gdz po rebochei tetradi po russkomu iazyku bagdanova 7 klass
Reviewers on Ozon generally describe the material as easy to digest and useful for reinforcing classroom lessons, though the physical quality of the paper is noted as standard/average. Many versions include not just the final answer