"Analytic geometry", Stukopin . V. A. 25.02.2021г.

Whole-channel inclusion: Дистанционные занятия МФТИ is an honest teaching channel (title sample + 3 transcripts read: All three samples lack transcripts, but titles/descriptions confirm structured university lecture content consistent with the channel's established 'whole' verdict.); this title passed a strict title check (sonnet) after a labelling pass.