The Pattern Component Order of Precedence

Precedence Level, Component, and Examples

Precedence Level	Component	Examples
1	Parentheses	(...), (?:...), (?=...)
2	Quantifiers	*, +, ?, {n}, {n,m}
3	Sequences and Anchors	Sequences (abc), Anchors (^, $, \b, \A, \z)
4	Alternation	`