jerarquía de operaciones

2*9-7-(7+1+3-1)

2*2+6+1-(3-1-1)

[9+6-(2+5+2)]*1

0.5/5 +10

21 - (5-6+2) - [5- (6-3+1)-2]

5.8/(2.6-1.8)

6*{6-[3-(1-1)]} - (5+1)

9-(9-9)-(2+5)*(7-7)

(7-2+4) - (2-5)

(9-8) * (7+7+2-3)

1

18

10

6

9

12

13

12

7.25

10.1