30: (56:7 - 3)x5 = 30 : (8 - 3) x 5 = 30 : 5 x 5 = 30
6 - (8 - 1x4) + 9 = 6 - (8 - 4) + 9 = 6 - 4 + 9 = 11
0,5 x (18:3 - 4 + 4x8) - 3,5 = 0.5 x (6 - 4 + 32) - 3.5 = 0.5 x 34 - 3.5 = 17 - 3.5 = 13.5
41,5[40 - 9x(14 - 2x5)] = 41.5[40 - 9x4] = 41.5(40 - 36) = 41.5x4 = 166
20 - [12 : (56:8 - 4) x5 - 4 ] = 20 - [12:(7 - 4)x5 - 4 ] = 20 - [12 : 3 x 5 - 4] = 20 - (4x5 - 4) = 20 - 16 = 4
