Symbols of grouping

Symbols used in mathematical expressions

In mathematics and related subjects, understanding a mathematical expression depends on an understanding of symbols of grouping, such as parentheses, square brackets [], and braces {}. These same symbols are also used in ways where they are not symbols of grouping. For example, in the expression 3(x+y) the parentheses are symbols of grouping, but in the expression the parentheses may indicate an open interval.

This keyword could refer to multiple things. Here are some suggestions: