(7 * 7 − 7) : 7 = (49 − 7) : 7 = 42 : 7 = 6;
7 + 7 + 7 : 7 = 7 + 7 + 1 = 14 + 1 = 15;
7 : 7 + 7 : 7 = 1 + 1 = 2;
7 * 7 + 7 * 7 = 49 + 49 = 98;
(7 * 7 + 7) : 7 = (49 + 7) : 7 = 56 : 7 = 8;
(7 * 7 − 7) * 7 = (49 − 7) * 7 = 42 * 7 = 294;
7 * 7 − 7 : 7 = 49 − 1 = 48;
7 * 7 + 7 : 7 = 49 + 1 = 50.