by Chelsea Lee Punctuation Junction: A series about what happens when punctuation marks collide. Parentheses and brackets are used to enclose and set off material. What's the difference between parentheses, square brackets, and curly braces? When do you use them? A grammar expert offers Quick and Dirty Tips to help you learn how. In mathematics, various typographical forms of brackets are frequently used in mathematical notation such as parentheses ( ), square brackets [ ], braces , and. Round brackets or parentheses Braces or curly brackets Chevrons or angle brackets; Punctuation; apostrophe ’ ' brackets [ ] ( ) colon The following terminology is used in American English (British English may be different.) Parenthesis definition. Sense extension by 1715 from the inserted words to the curved brackets that indicate the words inserted. A wooden parenthesis;. Rule 2a. Periods go inside parentheses only if an entire sentence is inside the parentheses. Example: Please read the analysis. (You'll be amazed.) Brackets (Parentheses) Brackets are symbols used in pairs to group things together. Parentheses and brackets ( ) [ ] - Language reference content from Oxford. Help with language usage, grammar questions, punctuation, spelling, and language learning. Parenthesis, Braces and Brackets. You'll come across many symbols in mathematics and arithmetic. In fact, the language of math is written in symbols and of.