How to Use a Bracket in Grammar
https://grammar.yourdictionary.com/punctuation/how-to-use-brackets-in-grammar.html
Writers use brackets in academic writing to add information to a quote without changing the meaning of the sentence. This means that the writer can add words, if necessary, to make the sentence clearer or add a correction or comment to quoted material. Normally, a quotation must be presented exactly as it was spoken or written.
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