Ключевые слова: advice, art, author, average, backdrop, book, cartoon, counting, data, education, events, formula, fortune, function, glossary, guidance, history, illustration, individual, information, key to knowledge, mathematics, maths, numbers, object, open, outside, painting, paper, party, printing, publishing, reading, real, reports, school, science, solving math problems, teaching high, testing, text, textbook, university, wisdom, writing,