Question

e essa 25-[16-4+{2+1}]

Answer 1

25 - [ 16 - 4 + { 2 + 1 }]
25 - [ 16 - 4 + 3 ]
25 - [ 15 ]
25 - 15
10

Answer 2

= 25 - { 16 - 4 + [2+1]}
= 25 - {16 - 4 + 3}
= 25 - {  12 + 3}
=25 - 15
=10

Resp.: = 10