professor writing formula big class blackboard |
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navigate by keyword : academic amphitheatre audience auditorium big blackboard board chalk chalkboard class classroom clipart college conference congress convention desk education elder electrodynamics equation event flat formula group illustration isolated lecture lesson man math mathematical multilevel multistories people physics professor quantum school seminar sit standing student teacher teaching university vector woman writing |
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Professor writing physics formula on blackboard during university lecture class. Big full multilevel classroom interior. Students sitting at desks. Higher education. Flat vector character illustration |
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