Sites like Scribd often host older versions of educational manuals.

Repositories like EGE-OK carry similar Lysenko manuals that follow the same structure and difficulty progression. Untitled | PDF - Scribd

A separate book providing detailed solutions and step-by-step explanations for the most difficult problems (usually those with extended answers). Where to Find Materials

Usually contains thematic training tasks, 40 options for testing, and theoretical material. It covers tasks from both the basic and profile levels (formerly Part B and Part C).

While the 2013 edition is older, you can often find archived PDF versions or similar materials from that era on educational platforms: