Ключевые слова: abstract, add, addition, against, analysis, background, balance, balance sheet, bath, block, business, calculating, calculation, choice, comparison, concept, contra, cube, decision, design, difference, economy, equilibrium, failure, feedback, for, good, idea, illustration, isolated, loess, lplus, luck, marketing, mathematics, minus, misfortune, negative, no, object, opposite, option, per, pitch, plus, positive, profit, shape, sign, square, strategy, subtract, subtraction, success, sum, symbol, symbolic image, white, wood, wooden, work, yes,