3. Efectuan:
a) 5-[5+ 5-(5-55-5°)] +3-5²
b) (6+2:2) 10-9-10;
e) 10 (18:324+2-[(23)"
[(4) 4+4-2]-[(4)
(2-3")+1]}
4+2.4²+47:4];
e) [2² -2 +5:5-(3)] [4²-2² 2² +(5¹) (3³)*];
D2+[(2¹)-(2) +3-31-81] (3¹-[301-10-(24+2012-2013)]}