Whether presenting in a boardroom, off an iPad, over the Web or as a print-out, the right delivery is the difference between a great presentation and, at best, a missed opportunity and, at worst, a presentation disaster. All the other elements donât matter if the delivery doesnât work.
Parentheses have a great many specialized meanings in mathematics. A few of these are described below. 1. Parentheses are used in mathematical expressions to denote modifications to normal order of operations (precedence rules).
1 Brackets: Symbols that are placed on either side of a variable or expression, such as | x 2  |. Other non-letter symbols: Symbols that do not fall in any of the other categories.  Letter-based symbols: Many mathematical symbols are based on, or closely resemble, a letter in some alphabet.