Toán Lớp 8: BT1: a,-3$x^{}$(x+2)$^{2}$ +(x+3)(x-1)(x+1)-(2x-3) b,2x(x-4)$^{2}$ -(x-5)(x-2)(x+2)+2(x-5)$^{2}$ -(x-1)$^{2}$ c,(x-2)($x^{2}$ +2x+4)-(

Toán Lớp 8: BT1:
a,-3$x^{}$(x+2)$^{2}$ +(x+3)(x-1)(x+1)-(2x-3)
b,2x(x-4)$^{2}$ -(x-5)(x-2)(x+2)+2(x-5)$^{2}$ -(x-1)$^{2}$
c,(x-2)($x^{2}$ +2x+4)-(x-1)$^{3}$ +7 d,x(x-2)(x+2)+(x+3)($x^{2}$ -3x+9)
e,(3x+2)$^{3}$ -18x(3x+2)+(x-1)$^{3}$ -28$x^{3}$ +3x(x-1)