See RegularExpression

s/\<\(RegularExpression\)s\>/\1/gp

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See:
* AlternativesToRegularExpressions
* MasteringRegularExpressions
* RegularExpressionExamples
* RegularExpressionLibraries
* RegularExpressionMatchAssertion
* RegularExpressionsArent
* StructuralRegularExpressions

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CategoryRegularExpressions CategoryRedirect