Answer:
Why are brackets used in writing?
Brackets (parentheses) are punctuation marks used within a sentence to include information that is not essential to the main point. Information within parentheses is usually supplementary; were it removed, the meaning of the sentence would remain unchanged.
Why are brackets used in math?
Brackets are used to provide clarity in the order of operations, the order in which several operations should be done in a mathematical expression. ... In this example, the parentheses tell you to do something different than the usual order of operations. Other times, they are simply used for visual clarity.