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Bracket (mathematics) - Wikipedia
Brackets (Parentheses) - Math is Fun
What are Brackets in Math? Definition, Types, Examples & Uses
What’s the Difference Between ( ), [ ], { } and < >? - Mental Floss
Brackets in Math – Definition with Examples - Brighterly
Set Symbols - Math is Fun
Parentheses, Braces, and Brackets in Math - ThoughtCo
Bracket -- from Wolfram MathWorld
What does it mean when a set is defined with curly brackets?
Brackets Definition (Illustrated Mathematics Dictionary) - Math is …