康MM當然是牛人:

來源: 2009-07-14 18:20:15 [博客] [舊帖] [給我悄悄話] 本文已被閱讀:
(1-3),6,10 => (-2*10),6 => (6-(-20))

我是用了program:

http://www.mp95.com/cgi-bin/verify24.pl