"Aha!" Maxim whispered. The "free" part of the GDZ wasn't just about the money; it was about the freedom from the mental block that had paralyzed him for two hours.

The solution popped up—handwritten, scanned, and perfectly clear. He watched how the author moved the

He typed the phrase that every desperate student knows by heart: (free solved exercises for 10th grade algebra, Nikolskii).