Question 317861
1) -(-3x+y-5)+(7x+2y+9)-2(7x+3)

3x-y+5+7x+2y+9-14x-6
-4x+3y+8
..
..

2) -(2x-5y)-{8-6y-[9x-(-11y+15)]-8x}
-2x+5y-{8-6y-[9x+11y-15]-8x}
-2x+5y-{8-6y-9x-11y+15}
-2x+5y-8+6y+9x+11y-15
7x+22y-23