3 + 4; 3 + 4 + 5; 4.5; 7 - 5; 7 - 5 + 3; 7 + 5 - 3; 7 - 5 - 3; 4 * 7; 4 * 3 * 5; 4 + 7 * 3; 4 * 7 + 3; 7 - 4 * 3; 4 * 7 - 3; 10 / 2; 10 / 4 / 5; 4 / 5 + 2; 4 / 5 - 1; 4 * 7 + 8 / 2; 3/5*2+5; 5 * (8+7); (5+3) * 7; -66; 5*-4; -(5+-3)*-(-7---60);