Răspuns: 27
Explicație pas cu pas:
5 × (4 + 3 × 7) - 2 × {5 + 2 × [10 - 3 × (17 - 3 × 7)]} =
= 5 × (4 + 21) - 2 × {5 + 2 × [10 - 3 × (17 - 21)]}
= 5 × 25 - 2 × [5 + 2 × (10 - 3 × -4)]
= 125 - 2 × [5 + 2 × (10 + 12)]
= 125 - 2 × (5 + 2 × 22)
= 125 - 2 × (5 + 44)
= 125 - 2 × 49
= 125 - 98
= 27
