Ключевые слова: background, black, calculating, calculation, classical, clear, closeup, collecting, colors, composition, concept, conceptual, correct, details, elections, equal, equality, fair, fairness, formula, four, illustrating, law, logic, logical, marks, math, meaning, message, natural, numbers, objects, operation, plus, political, positive, red, signs, simple, still life, structure, symbols, true, two, understanding, wood, wooden, yellow,