43 - (20-7) + 15=32+9 * (19-16) = 80/8/5=21/7*9=27/3*4=75 - (35-30) * 7=60/4 (4+6) * 3=76-27+9-10=2*9-18/3=

1) 43 - (20 - 7) + 15 = 43 - 13 + 15 = 30 + 15 = 45;

2) 32 + 9 * (19 - 16) = 32 + 9 * 3 = 32 + 27 = 59;

3) 80 / 8 / 5 = 10 / 5 = 2;

4) 21 / 7 * 9 = 3 * 9 = 27;

5) 27 / 3 * 4 = 9 * 4 = 36;

6) 75 - (35 - 30) * 7 = 75 - 5 * 7 = 75 - 35 = 40;

7) 60 / 4 * (4 + 6) * 3 = 15 * (4 + 6) * 3 = 15 * 10 * 3 = 150 * 3 = 450;

8) 76 - 27 + 9 - 10 = 49 + 9 - 10 = 58 - 10 = 48;

9) 2 * 9 - 18 / 3 = 2 * 9 - 6 = 18 - 6 = 12.