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How to Cite "Grouping Symbols and Order of Operations" from CliffsNotes.com:

CliffsNotes.com. *Grouping Symbols and Order of Operations*. 01 Nov 2014

<http://www.cliffsnotes.com/math/basic-math/basic-math-and-pre-algebra/preliminaries/grouping-symbols-and-order-of-operations>.

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Grouping Symbols and Order of Operations