Question

Resolva: -20-{+8 -6 -5-[+7 -23+(-7 +7)]-22}

Answer 1

-20-{8-11-[-16]-22}
-20-{8-11+16-22}
-20-{24-33}
-20-{-9}
-11

Answer 2

20-{+8-6-5[+7-23+(-7+7)]-22}
20-{+8-6-5[+7-23+-14]-22}
20-{+8-6-5+14+14]-22}
20-{+2-5+14+14]-22}
20-{+2-5+28]-22}
20-{+2-33]-22}
20-{+31-22}
20-9
11
Olha, deve estar errado, mais eu tentei...