Grammarly
Grammarly Handbook: Brackets
This page explains the various types of brackets including parentheses (), square brackets [], curley brackets {}, and Chevron brackets . It also explains their uses and provides examples.
University of Victoria (Canada)
The U Vic Writer's Guide: Knowing the Basics of Grammar
This grammar tutorial for college students features help on verb agreement, the use of semicolons, sentence structure, and more.
Grammarly
Grammarly Blog: Comma Before Parenthesis
This page explains the proper use of commas with parenthesis: no comma before a parenthesis, no comma after a parenthesis unless it is needed for another reason such as a long introductory clause in a complex sentence, and no commas if...
University of Victoria (Canada)
The U Vic Writer's Guide: Grammar: Parentheses
This site contains information regarding the correct usage of parentheses, along with examples.