5 * 3 * 4 = 11;
8 * 2 * 7 = 28;
20 * 5 * 6 = 24;
12 * 3 * 4 = 8;
18 * 6 * 2 = 30;
5 * 8 * 4 = 36;
30 * 3 * 7 = 9;
14 * 7 * 2 = 0;
2 * 9 * 3 = 21.
5 • 3 − 4 = 15 − 4 = 11;
8 : 2 • 7 = 4 • 7 = 28;
20 : 5 • 6 = 4 • 6 = 24;
12 : 3 + 4 = 4 + 4 = 8;
18 + 6 • 2 = 18 + 12 = 30;
5 • 8 − 4 = 40 − 4 = 36;
30 − 3 • 7 = 30 − 21 = 9;
14 − 7 • 2 = 14 − 14 = 0;
2 • 9 + 3 = 18 + 3 = 21.