The Teacher, the Fedathi Sequence and the Failure Indexes of the Subject Differential and Integral Calculus. Research, Society and Development, [S. l.], v. 11, n. 9, p. e44011932007, 2022. DOI: 10.33448/rsd-v11i9.32007. Disponível em: https://rsdjournal.org/rsd/article/view/32007. Acesso em: 5 dec. 2025.