Ключевые слова: analysis, art, atom, background, blackboard, board, classroom, clip, collection, college, design, dna, doodle, drawing, drawn, education, experiment, formula, graphic, hand, icon, illustration, ink, innovation, laboratory, learning, line, molecule, paper, pen, physics, repeat, school, science, scribble, set, sign, sketch, sketchy, study, symbol, technology, test, textbook, texture,