2. 460+320, 780-650, 84:7, 3*19, 100-56:(38-30), 96-48:8*6

460 + 320 = 780
780 - 650 = 130
84 : 7 = 12
3 * 19 = 57
100 - 56 : (38 - 30) = 100 - 56 : 8 = 100 - 7 = 93
96 - 48 : 8 * 6 = 96 - 6 * 6 = 96 - 36 = 60