Ключевые слова: algebra, background, black, blackboard, chaos, classroom, complexity, design, division, doodle, drawing, education, element, fact, formula, geometry, handwriting, illustration, image, imitation, intricacy, manuscript, mathematical, mathematics, minus, multiplication, painting, pattern, pencil, plus, problems, proof, school, science, scrawl, scribble, seamless, sign, sketch, solution, square, style, symbol, texture, theorem, university, vector, wallpaper, white,