45+3{34-(18-14)} / 3[17+3*4-(2*7)]

45 + 3{34 - (18 - 14)}/3[17 + 3 × 4 - (2 × 7)] = 45 + 3{34 - 4}/3[17 + 3 × 4 - 14]

= 45 + 3 × 30/3[17 + 12 - 14]

= 45 + 90/3 × 15

= 135/45

= 3

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