Ключевые слова: abstract, area, book, branch, chance, combination, combinatorial, combinatorics, concept, conceptual, cover, creative, design, discrete, education, expectation, field, front, illustration, knowledge, learn, likelihood, logic, math, mathematical, mathematics, page, patern, possibility, probability, school, science, scientific, study, stylized, subject, teach, text, textbook, theoretic, theory, title, topic, word,