∵(a²-3a-3-a³)-(a-8+4a²+2a³)+(3a³+3a²+4a-1)
=a²-3a-3-a³-a+8-4a²-2a³+3a³+3a²+4a-1
=﹙﹣a³-2a³+3a³﹚+﹙a²-4a²+3a²﹚+﹙4a-3a-a﹚+﹙8-3-1﹚
=0+0+0+4
=4
∴ 此代数式与a的值无关.
∵(a²-3a-3-a³)-(a-8+4a²+2a³)+(3a³+3a²+4a-1)
=a²-3a-3-a³-a+8-4a²-2a³+3a³+3a²+4a-1
=﹙﹣a³-2a³+3a³﹚+﹙a²-4a²+3a²﹚+﹙4a-3a-a﹚+﹙8-3-1﹚
=0+0+0+4
=4
∴ 此代数式与a的值无关.