1. Plain Strings (203): .*foo.*
2. Anchors (208): k$
3. Ranges (202): ^[a-f]*$
4. Backrefs (200): (.{3}).*\1
5. Abba (169): ^(.(?!(ll|ss|mm|rr|tt|ff|cc|bb)))*$|^n|ef
6. A man, a plan (164): (.)(.).{0,1}\2\1
7. Prime (184): ^(x{2,3}|x{5}|x{7}|x{11}|x{13}|x{17}|x{19}|x{23}|x{29}|x{31}|x{37}|x{41}|x{43}|x{47}|x{53}|x{59}|x{61}|x{67}|x{71})$
8. Four (165): (.*a){4}|(.*e){4}|(.*i){4}|(.*o){4}
9. Order (187): ^[a-m][c-o][^ad].*[^d]$
10. Triples (507): (^39|^44)|(^([0369]|([147][0369]*[258])|(([258]|[147][0369]*[147])([0369]*|[258][0369]*[147])([147]|[258][0369]*[258])))*$)
11. Glob (364): ^((\*(er|f|i|p|t|v))|(b|c(h|o|r)|do|l|mi|p(a|r|u)|re|w))
12. Balance (220): ^<{2,5}>|^(<>){0,2}$
13. Powers (43): ^(x{1,2}|x{4}|x{8}|x{16}|x{32}|x{64}|x{128}|x{256}|x{512}|x{1024})$

Total Score: 2816