24点游戏(2、2、3、11)

1: 2 (3 - 2 + 11)2: 2 ((3 - 2) + 11)3: 2 (3 - (2 - 11))4: 2 (3 + 11 - 2)5: 2 ((3 + 11) - 2)6: 2 (3 + (11 - 2))7: 2 (11 - 2 + 3)8: 2 ((11 - 2) + 3)9: 2 (11 - (2 - 3))10: 2 (11 + 3 - 2)11: 2 ((11 + 3) - 2)12: 2 (11 + (3 - 2))13: (3 - 2 + 11) 21