0@a\(b\)c@abc 0@a(@a( 2@a\(@EPAREN 2@a\(b@EPAREN 0@a(b@a(b 0@a)@a) 2@a\)@EPAREN 2@\)@EPAREN 0@a\(\)b@ab 0@a^b@a^b@TO CORRECT 0@a$b@a$b 0@\($\)\(^\)@@ 0@a*\(^b$\)c*@b 0@|@| 0@*@* 0@\(\)@abc 2@\(\{1\}a\)@BADRPT@TO CORRECT 0@^*@* 2@^\{1\}@BADRPT@TO CORRECT 0@{@{ 1@a\(b*\)c\1d@abbcbd 1@a\(b*\)c\1d@abbcbbbd 1@^\(.\)\1@abc 0@a\(\([bc]\)\2\)*d@abbccd 1@a\(\([bc]\)\2\)*d@abbcbd 0@a\(\(b\)*\2\)*d@abbbd 0@\(a\)\1bcd@aabcd 0@\(a\)\1bc*d@aabcd 0@\(a\)\1bc*d@aabd 0@\(a\)\1bc*d@aabcccd 0@\(a\)\1bc*[ce]d@aabcccd@TO CORRECT 0@^\(a\)\1b\(c\)*cd$@aabcccd 0@a\(*\)b@a*b 0@a\(**\)b@ab 2@a\(***\)b@BADRPT@TO CORRECT 0@*a@*a 0@**a@a 2@***a@BADRPT@TO CORRECT 0@a\{1\}b@ab 0@a\{1,\}b@ab 0@a\{1,2\}b@aab 2@a\{1@EBRACE 2@a\{1a@EBRACE 2@a\{1a\}@BADBR 2@a\{,2\}@BADBR 2@a\{,\}@BADBR 2@a\{1,x\}@BADBR 2@a\{1,x@EBRACE 2@a\{32768\}@BADBR 2@a\{1,0\}@BADBR 0@ab\{0,0\}c@abcac 0@ab\{0,1\}c@abcac 0@ab\{0,3\}c@abbcac 0@ab\{1,1\}c@acabc 0@ab\{1,3\}c@acabc 0@ab\{2,2\}c@abcabbc 0@ab\{2,4\}c@abcabbc 2@a\{1\}\{1\}@BADRPT@TO CORRECT 2@a*\{1\}@BADRPT@TO CORRECT 2@a\{1\}*@BADRPT@TO CORRECT 1@a\(b\)?c\1d@acd 0@-\{0,1\}[0-9]*$@-5