Many of those have special meaning inside a
regular expression, so I suggest you try them one at a time when in doubt.
The backslash will need to become a foursome (\\\\), and other known special characters include the dot, asterisk, dollar-sign, etc..
Here's part of the manpage:
Regular Expressions
Regular expressions are the extended kind found in egrep.
They are composed of characters as follows:
c matches the non-metacharacter c.
\c matches the literal character c.
. matches any character including newline.
^ matches the beginning of a string.
$ matches the end of a string.
[abc...] character list, matches any of the characters abc....
[^abc...] negated character list, matches any character except abc....
r1|r2 alternation: matches either r1 or r2.
r1r2 concatenation: matches r1, and then r2.
r+ matches one or more r’s.
r* matches zero or more r’s.
r? matches zero or one r’s.
(r) grouping: matches r.
r{n}
r{n,}
r{n,m} One or two numbers inside braces denote an interval expression. If there is one number
in the braces, the preceding regular expression r is repeated n times. If there are
two numbers separated by a comma, r is repeated n to m times. If there is one number
followed by a comma, then r is repeated at least n times.
Interval expressions are only available if either --posix or --re-interval is specified
on the command line.
\y matches the empty string at either the beginning or the end of a word.
\B matches the empty string within a word.
\< matches the empty string at the beginning of a word.
\> matches the empty string at the end of a word.
\w matches any word-constituent character (letter, digit, or underscore).
\W matches any character that is not word-constituent.
\‘ matches the empty string at the beginning of a buffer (string).
\’ matches the empty string at the end of a buffer.
The escape sequences that are valid in string constants (see below) are also valid in regular
expressions.
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