1. $$3(x+3)-3(4-x)-x-3 = 3x + 9 - 12 + 3x - x - 3 = 5x - 6$$
2. $$3(x+5)-(4-x)-(1+3)x-3 = 3x + 15 - 4 + x - 4x - 3 = 0x + 8 = 8$$
3. $$2(x+4)-3(2-x)-x-4 = 2x + 8 - 6 + 3x - x - 4 = 4x - 2$$
4. $$x+1-5(2-x)-(5+1)x-5 = x + 1 - 10 + 5x - 6x - 5 = 0x - 14 = -14$$
5. $$x+3-(2-x)-x-4 = x + 3 - 2 + x - x - 4 = x - 3$$
6. $$4(x+3)-(5-x)-x-4 = 4x + 12 - 5 + x - x - 4 = 4x + 3$$
7. $$3(x+3)-4(1-x)-(4+3)x-1 = 3x + 9 - 4 + 4x - 7x - 1 = 0x + 4 = 4$$
8. $$5(x+5)-3(3-x)-x-3 = 5x + 25 - 9 + 3x - x - 3 = 7x + 13$$
Ответы:
1. 5x - 6
2. 8
3. 4x - 2
4. -14
5. x - 3
6. 4x + 3
7. 4
8. 7x + 13