Question

25 - (a-b+c)=
(25 - z ) + (t-18) =
- (p+3) + (q-7) =
Срочно, пожалуйста!

Answer 1

25 - (a-b+c)=25-a+b-c
(25 - z ) + (t-18) =25-z+t-18 
- (p+3) + (q-7) =-p-3+q-7