Ключевые слова: abstract, background, book, business, busy, calculate, class, concept, danger, death, desk, dice, economist, economy, equation, exam, examining, exhausted, finance, financial, hard, headache, ill, information, investment, market, mathematic, media, medicine, note, numbers, office, overdosage, overwork, painkillers, paper, pencil, pharmacy, pills, progress, rubber, school, skull, study, success, table, tiresome, work, working, workplace,