- HTML5
(9)(9)- C
\u0028\u0039\u0029 (C99)\U000028\U000039\U000029 (C99)\x28\x39\x29 (encoding-dependent)\050\071\051 (encoding-dependent)- C++
\u{28}\u{39}\u{29} (C++23)\x{28}\x{39}\x{29} (C++23, encoding-dependent)\o{050}\o{071}\o{051} (C++23, encoding-dependent)\U00000028\U00000039\U00000029\u0028\u0039\u0029\x28\x39\x29 (encoding-dependent)\050\071\051 (encoding-dependent)- Java
\u0028\u0039\u0029- JavaScript
\u{28}\u{39}\u{29}\u0028\u0039\u0029\x28\x39\x29- CSS
\28\39\29\000028\000039\000029- Quoted-Printable
=28=39=29- URL
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