4 * 2 + 4;
6 * 2 + 6;
8 * 3;
7 * 3;
18 − (15 − 7);
40 + (9 + 13);
6 * 3 : 2;
3 * 4 : 2.
4 * 2 + 4 = 4 * 3 = 12;
6 * 2 + 6 = 6 * 3 = 18;
8 * 3 = 24;
7 * 3 = 21;
18 − (15 − 7) = 18 − 8 = 10;
40 + (9 + 13) = 40 + 22 = 62;
6 * 3 : 2 = 18 : 2 = 9;
3 * 4 : 2 = 12 : 2 = 6.