二十四点题目10,9,2,13

1: 10 2 - 9 + 132: (10 2) - 9 + 133: (10 2 - 9) + 134: ((10 2) - 9) + 135: 10 2 -(9 - 13)6: (10 2) - (9 - 13)7: 10 2 + 13 - 98: (10 2) + 13 - 99: (10 2 + 13) - 910: ((10 2) + 13) - 911: 10 2 +(13 - 9)12: (10 2) + (13 - 9)13: (9 - 10 + 13) 214