2013 Febrero 1 semana mate I Ambientales ejercicio 1 parte 1

Whole-channel inclusion: profesor10demates is an honest teaching channel (title sample + 3 transcripts read: The transcripts show legitimate step-by-step math problem-solving teaching (rationalizing radicals, degrees-to-radians conversion) consistent with the channel's educational focus.); this title passed a strict title check (sonnet) after a labelling pass.