(30-2)*57*(60-2)85*137-75*13778*214-78*204

(30 - 2) * 57 * (60 - 2) * 85 * 137 - 75 * 13778 * 214 - 78 * 204 = 856801548

1) 30 - 2 = 28;

2) 28 * 57 = 1596;

3) 60 - 2 = 58;

4) 1596 * 58 = 92568;

5) 92568 * 85 = 7868280;

6) 7868280 * 137 = 1077954360;

7) 75 * 13778 = 1033350;

8) 1033350 * 214 = 221136900;

9) 78 * 204 = 15912;

10) 1077954360 - 221136900 = 856817460;

11) 856817460 - 15912 = 856801548