5 + (3 +1)2 =
5+ [-2(-1+3)]2 =
4-2[5-2(4-2)] ÷2 =
12-2(6-3)2 ÷ 3 =

(5-4) + (4-1)2=
8 + (2-5)

9-5 ÷ (8-3) (2) +6 =
6 -42 ÷ 2 – 23 +3 =
12 ÷ 2 –(6-4) (32) (7) =
(23) (5) ÷ (5-1) ÷ (2-1) (6) =
53 – [(5)(2)]2 – 24 – 23 =

con eso