Szürke haj professzor előadóterem állt és nézett kamera - Stock fotó és kép

Grey hair professor sitting on table in lecture room and holding book

Grey hair professor pointing on something at blackboard

Grey hair professor pointing on something at blackboard

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Smiling grey hair professor holding paper plane in lecture room

Process for each solution. bearded lecturer man explain geometry. back to school. Math graphic tools. trigonometry lesson in classroom. get knowledge here. senior man teacher use math tools.

Classic subjects learning. Improve teaching skills. Mature pedagogue. Teaching has changed in last years. Man bearded tutor in classroom. Teaching is passion. Main task in teaching. Formal education.

Grey hair professor holding stack of books

Honored professor. Teacher bearded man tell cheerful story. Teacher charismatic grandpa sit at table classroom chalkboard background. Talking to students or pupils. Senior school teacher concept.

Smiling senior man looking at camera while touching jacket isolated on grey

Close-up portrait of senior man reading book

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Handsome grey hair man holding book and looking at camera at home

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Senior man smoking cigar and drinking whiskey in armchair

Senior man looking at camera while touching jacket on grey background