Brackets

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Brackets
	Parentheses. Use them to control the order of the operations.
	Vector. See Linear algebra section.
	List. Some results or parameters are given or requested in this form.
	Absolute value. Removes the sign from a number.
	Norm. Length of a vector.

Do not use curly or square brackets as parentheses. Use only proper parentheses.

Expression	Result
2·3+4·5+6·7+x	Error
2·3+4·5+6·7+x	OK

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