To find the missing values in the equation, we need to solve for the unknowns.

Given: 5108kg - {-1-?,2-?} - 2025kg - 3 - 1108kg

Breaking down the terms:
-{-1-?,2-?} = -1 - ? + 2 - ?
= 1 - ? - ?

Putting back into the equation:
5108kg - (1 - ? - ?) - 2025kg - 3 - 1108kg

Simplify:
5108kg - 1 + ? + ? - 2025kg - 3 - 1108kg

Now we need to equate the total weight:
5108kg + ? = 2025kg + 3 + 1108kg

Solving for ? and adding the known values:
5108 - 2025 - 3 - 1108 = 1972kg

Therefore, the missing values are: ?, ? = 1972kg