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Male school teacher drawing curve on blackboard with chalk. Man lecturer teaching in class, conducting math lesson at chalkboard in classroom. flat vector illustration isolated on white background 20581884 Vector Art at
School teacher stands near blackboard. Lecturer in College in classroom. Profession at University. Cartoon flat illustration. Podium for speech. Clean chalkboard for chalk text. man in suit 27382375 Vector Art at Vecteezy
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Premium Photo | Faceless lecturer chalking formula on blackboard
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Teacher near the blackboard with chalk. Business conference, presentation. Lecture at the university, training. Lecturer lesson. Courses of knowledge. Silhouette Vector Illustration Stock Vector | Adobe Stock
Premium Vector | Female teacher lecturer with blank chalk board in wooden frame and pointer simple flat illustration.