1:9 - (7 - 10) × 52:9 - ((7 - 10) × 5)3:9 - (5 × (7 - 10))4:9 - 5 ×(7 - 10)5:9 + (5 × (10 - 7))6:9 + 5 ×(10 - 7)7:9 + (10 - 7) × 58:9 + ((10 - 7) × 5)9:(5 × (10 - 7)) + 910:5 × (10 - 7) + 91...