2 + 5 / 3 * 2;
(2 + 5) / 3;
((10 - 213) * 25) + 27;
(7 - 3) * 4^3;
(1 + 1) * 1 - 2;
--1;
1--1^2;
1--1^3;
1++2^2;
4 + 1 * 3;
-1^2;
1-1^2;
1+-1^2;
