00677naa#a2200169#i#450# EN\\bibl\97950 20250504062712.7 2686-9896 20250428b2025####ek#y0engy0150####ca RU ELECTIVE COURSE IN MATHEMATICS FOR STUDENTS OF MBOU SECONDARY SCHOOL No. 7 IN ANGARSK Journal article Angarsk Federal State Funded Educational Establishment of Higher Education «Angarsk State Technical University» 2025 1 с. Journal article local Преподавание отдельных учебных предметов. 372.8 Museva Tat'yana Nikolaevna angtu.editorum.ru