11,2
23
: )))))(((
1 + 1 x 2 + 3 = 7
11 - 11 = 0
9 - 8 + 2 - 3 = 0
10 - 2 + 3 - 1 + 8 - 9 + 1 = 10
1 + 1 = 2
1 + 1 x 2 + 3 = 7
1.A
2.B