"\C-x(": "s/\([[:space:]]\)\(\(\([[({]\(\([[({]\(\([[({]\([^][(){}]\{0,1\}\)[]})]\)\{0,1\}[^][(){}]\{0,1\}\)[]})]\)\{0,1\}[^][(){}]\{0,1\}\)[]})]\)\{0,1\}[^][(){}]\{0,1\}\)*\)/\1(\2)/n"

YES! Finally something with a manly learning curve ! Enough with all this baby high level programming languages and UI's. ALL computer interaction should preferably be in a random mix of brainfuck and ed(2) ! Maybe with a little regex expressions randomly inserted here and there to keep us sharp ;-)