Junger bärtiger Mann Wissenschaftler oder Professor mit langem Bart und Lehrerbrille mit Buch oder Notizbuch sitzt am Tisch mit Holzwürfeln auf weißem Hintergrund - Stockfoto & -bild

Young handsome bearded man scientist or professor with long beard and teacher glasses with book or notepaper sitting at table with wooden cubes isolated on white background

Young handsome bearded man scientist or professor with long beard and teacher glasses with red book or notepaper sitting at table with wooden cubes on light background

Young handsome bearded man scientist or professor with long beard and teacher glasses with book or notepaper sitting at table with wooden cubes isolated on white background

Young handsome bearded man scientist or professor with long beard and teacher glasses with book or notepaper sitting at table with wooden cubes isolated on white background

Young handsome bearded man scientist or professor with long beard and teacher glasses with book or notepaper sitting at table with wooden cubes isolated on white background

Young handsome bearded man scientist or professor with long beard and teacher glasses with pencil and book or notepaper sitting at table on light background

Young handsome bearded man scientist or professor with long beard and teacher glasses with red book or notepaper sitting at table with wooden cubes on light background

Young handsome bearded man scientist or professor with long beard and teacher glasses with red book or notepaper sitting at table with wooden cubes on grey background

Professor with serious face expression stands by desk with paper. Man with beard on white brick wall background. Teacher and school supplies in classroom. Classic education and knowledge concept

Handsome attractive business man having raised pen and notebook in hands, isolated on white background

Man teaching near chalkboard in classroom. Exam in college or university. Teacher or professor at classroom. Satisfied serious mature teacher. Mature professor, middle aged teacher man

Teachers day - knowledge and educational school concept. Young bearded teacher near chalkboard in school classroom. Tutoring

Thinking man. Portrait of a teacher or professor at classroom. Satisfied serious mature teacher. Mature professor, middle aged teacher man. Serious teacher, confident professor concept

Business man is thinking about something with pencil. Business dreams. Thoughtful young man in shirt and tie holding note pad and pen

Business man is thinking about something with pencil. Business dreams. Thoughtful young man in shirt and tie holding note pad and pen

Portrait of male teacher working at desk in class. Tutor, professor, mentor man at desk. Studying, learning, training concept

Thinking man. Portrait of a teacher or professor at classroom. Satisfied serious mature teacher. Serious teacher, confident professor concept

Business man in shirt and tie holding note pad and pen. Close up profile of surious man. Idea. Portrait of attractive intellectual business man thinking about notes