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).
Parenthesis is of course Greek and means in fact insertion. It has taken the meaning of the signs  (  or  ) . Parentheses is the regular plural. Usually, you use a pair of the signs showing an insertion, then between parentheses - or brackets ; however, in parenthesis means : as an afterthought. A parenthesis is one of the marks usually called (ordinary, or curved) brackets in the UK or material set off by a pair of brackets (or commas or dashes). I've just used four parentheses to enclose two parentheses â but I wouldn't usually mix senses like this as it gets too confusing.