Answer :
use bidmas
so in order of what to do its Brackets, Indices, Division, Multiplication, Add, Subtract
hence you as (12/4 - 1) is in brackets, and 12/4 is division, you do 12/4 = 3
3 - 1 = 2
2 - 5 - 2 = - 5
so in order of what to do its Brackets, Indices, Division, Multiplication, Add, Subtract
hence you as (12/4 - 1) is in brackets, and 12/4 is division, you do 12/4 = 3
3 - 1 = 2
2 - 5 - 2 = - 5