Разные олимпиады, но одна задача

Picked video by video from Mathin (mixed channel): title plainly names a teaching subject. Channel transcript sample: All three sampled videos lack transcripts, so no content could be verified despite the channel's title-based 'whole' verdict.

A 25-minute video from Mathin: “Разные олимпиады, но одна задача”.

Video by Mathin, played through YouTube's embedded player.