| 4x-(2x+2)= | 4x-2x-2=2x-2 |
| 23a+(7a-3b)= | 23a+7a-3b=30a-3b |
| 19y-(20y-9)= | 19y-20y+9=-1y+9=-y+9 |
| 25a+(-4a-7a)= | 25a-4a-7a=14a |
| 49-(-20x+13y)= | 49+20x-13y=20x-13y+49 |
| 78a-(5b-(2a+7b))= | 78a-(5b-2a-7b)=78a-5b+2a+7b=80a+2b |
| (25x-13y)-(18x+4y)= | 25x-13y-18x-4y=7x-17y |
| 95a-(10b+(15c-25d))= | 95a-(10b+15c-25d)=95a-10b-15c+25d |
| 100x+(15x-(90x+15x))= | 100x+(15x-90x-15x)=100x+15x-90x-15x=10x |
| 44a-(28b-(15c-8b))= | 44a-(28b-15c+8b)=44a-28b+15c-8b=44a-36b+15c |
| (51a-9b)+(15a-38b)= | 51a-9b+15a-38b=66a-47b |
| 50x-(40x-(35x-(20x-15x)))= | 50x-(40x-(35x-20x+15x))=50x-(40x-35x+20x-15x)=50x-40x+35x-20x+15x=40x |
| 99a-(88b-77c)= | 99a-88b+77c |
| (25a-(34a-53a+5a))= | (25a-34a+53a-5a)=25a-34a+53a-5a=39a |
| 40x-(30y+20x-(10y+20x))= | 40x-(30y+20x-10y-20x)=40x-30y-20x+10y+20x=40x-20y |