(1)2(4x-0.5) (2)-3(1-6/1x) (3)-x+(2x-2)-(3x+5)(4)3a²+a²-(2a²-2a)+(3a-a²) (5)(5a+4c+7b)+(5c-3b-6a)(6)(8xy-x²+y²)-(x²-y²+8xy) (7)(2x²-2/1+3x)-4(x-x²+2/1)(8)3x²-[7x-(4x-3)-2x²]