Răspuns :
(9x8+13):[5x4:(3+2)+1]
(72+13):[5x4:(3+2)+1]
85:[5x4:(3+2)+1]
85:[5x4:5+1]
85:[20:5+1]
85:[4+1]
85:5=17
(72+13):[5x4:(3+2)+1]
85:[5x4:(3+2)+1]
85:[5x4:5+1]
85:[20:5+1]
85:[4+1]
85:5=17