26 O 6 O 7 = 13;
7 O 9 O 2 = 18;
9 O 9 O 2 = 20;
9 O 2 O 2 = 16;
2 O 2 O 4 = 0;
8 O 9 O 2 = 70;
8 O 4 O 2 = 30;
40 O 5 O 7 = 56.
26 − 6 − 7 = 20 − 7 = 13;
7 + 9 + 2 = 16 + 2 = 18;
9 + 9 + 2 = 18 + 2 = 20;
9 * 2 − 2 = 18 − 2 = 16;
2 * 2 − 4 = 4 − 4 = 0;
8 * 9 − 2 = 72 − 2 = 70;
8 * 4 − 2 = 32 − 2 = 30;
40 : 5 * 7 = 8 * 7 = 56.