Keywords
1 person, 40-45 years, african-americans, arms crossed, balding, casual clothing, classroom, complexity, contented, education, elevated view, enthusiasm, felt tip pen, formula, half-length, half-length portrait, holding, indoors, looking at camera, mathematics, mid-adult man, number, people, portrait, professor, smiling, solution, standing, teacher, teaching, university, whiteboard, writing, 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, u14238399