21. Efectuați: 62) -40005
a) [(3²):37-30-3²]-4:34+2²;
b) [123+27-2² +267:227]:
x
[123+2¹4:25+(25)];
23
(25) : (4² +3³) -(02010+12012 +2013); 29
[3³-3+2-20 +(3³)*:3 +9°]:31; 3
e) (2² +9² +5° +36²): (0° +4¹ +3¹ +25³ +6¹). A
:329