1. 11 + 8 x {45+4 x [3+8 x 44-37]}+1234=
11 + 8 x {45+4 x 318} + 1234 =
11 + 9 x 1317 + 1234 =
11 + 10536 + 1234 =
11781
2. (480-160) + 132 + 7 x {124-5 x [210-2 x 103]} =
320 + 132 + 7 x [124 - 5 x 4] =
320 + 132 + 7 x 104 =
320 + 132 + 728 =
1180
3. 12 + 12 x {12 + 12 x [12+12 x 22]} =
12 + 12 x [12 + 12 x 276] =
12 + 12 x 3324 =
12 + 39888 =
39900
4. [100-3 x 31] x {1 + 2 x [ 3+4 x 47]} =
(100-93) x [1+2 x 191] =
7 x 383 =
2681