Question

quantos e 2- {-11+ [17-(- 12+20) -3]}

Answer 1

2- {-11+ [17-(- 12+20) -3]}
2- {-11+ [17- 8 -3]}
2- {-11+ [9 -3]}
2- {-11+ 6}
2- {-5}
2+5
7