12×5-9×4+14+ (54÷3)-8×2
=-1924 that is your answer.
12 × 5 - 9 × 4 + 14 + (54 ÷ 3) - 8 × 260 - 36 + 14 + 18 - 1660 - 22 + 18 - 1660 - 4 - 1656 - 1640