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);
