Question

(10-7)-(14-12) evalute

Answer 1

3-2=1
10-7=3
14-12=2
3-2=1

Answer 2

Distribute
(10-7) - 14 +12
Clear Parenthesis(you could have done it in the first step itself)
10-7-14+12
Then solve it as usual
And your final answer is 1