Question

{[73-64+20]-(40-31)}+(-3)
Alguém me ajuda?

Answer 1

{[9+20]-9}-3=
{29-9}-3=
20-3=
17

Answer 2

[73-64+20]-(40-31-3)
[73-64+20]-6
[9+20]-6
29-6=23