Evaluate.

3⋅ (1-2/10-3) + 123⋅ (1-210-3) + 12

26081.4

following the bdmas rule

bdmas: brackets, division, multiplication, addition, subtraction

3 (1 - 2/10 - 3) + 123 (1 - 2/10 - 3) + 12 = 126 (1 - 0.2 - 3) + 12 = 126 (-2.2) + 12 = - 277.2 + 12 = - 265.2

I assumed that the quantity in the second parenthesis is the same of the first parenthesis.

Answer: - 265.2