Keywords
1717, 45-50, 45-50 years, adult, away, brown, brown hair, caucasian, caucasian ethnicity, cloth, clothing, collar, education, equation, ethnicity, feb07, formal, formal clothing, geometry, hair, head, head and shoulders, indoors, jacket, knowledge, look, looking, looking away, man, math, math problem, mathematics, mature, mature adult, number, occupation, one man only, one mature man only, one person, open, open collar, person, point, pointing, problem, professional, professional occupation, purestock, shoulders, show, showing, side, side view, sseditor=sg, talk, talking, teach, teacher, teaching, trigonometry, view, whiteboard, years, stock image, images, royalty free photo, stock photos, stock photograph, stock photographs, picture, pictures, graphic, graphics, fine art prints, print, poster, posters, mural, wall murals, 1574r-25406, 1574r 25406, 1574r25406