Question

17+{[26-(15-8)+(8-4-9}

Answer 1

Começando pelos parentese 15-8=7
8-4-9=-5
Chaves=26-7=19+(-5) =14
17+14=31

Answer 2

17+{[26-(15-8)+(8-4-9)}

17 +{[26-(7)+(-5)]{

17+{26-7-5}
17 + {14} = 31