Left curly brace symbol.
Right curly brace.
The left square bracket symbol is used in math to delineate the start of a matrix.
The right square bracket symbol is used in math to delineate the end of a matrix.
The left parenthesis symbol is used to mark the start of an expression, or in the case of a function, a list of expressions.
The right parenthesis is used to mark the end of a group.
The notation for a set is two curly braces containing the elements of the set separated by commas.