To determine which expression has a value of 18, we can evaluate each expression and see which one equals 18.
5 × (40 – 25) – 50 = 5 × 15 – 50 = 75 – 50 = 25, which is not equal to 18.
6x (3212) (100 +50) - (6 + 18+6) + 15 + 10 = 6 × 3212 × 150 - 30 + 25 = 29,021,770, which is not equal to 18.
07+ (16-7)+3+8 = 7 + 9 + 3 + 8 = 27, which is not equal to 18.
Therefore, none of the given expressions has a value of 18.