Bracket Symbols

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This is a list of the most common bracket symbols:

Symbol	Definition	Example
\(\left(\; \right)\)	parentheses, calculate expression inside first	\( 5\times \left(5+4\right) = 45\)
\(\left[\; \right]\)	brackets, calculate expression inside first	\( \left[ \left(5+4\right) \times \left(9+4\right) \right] = 117\)
\(\{ \; \}\)	set, a collection	\(a = {4, 5, 9 } \)
\(\lfloor a \rfloor\)	rounds number to lower integer	\(\lfloor 5.4 \rfloor = 5\)
\(\lceil a \rceil\)	rounds number to upper integer	\(\lceil 5.4 \rceil = 6\)
\(\left \| a \right \|\)	absolute value	\(\left \| -5 \right \| = 5 \)
\(\left \\| x \right \\|\)	normal