(x-y﹚ ﹙x²+xy+y²﹚-(x-y﹚ ﹙x²+xy+y²﹚ (x3- y3) ²- ﹙x³+y³﹚ ﹙﹣x³+y³﹚(x3- y3) ²+﹙x³+y³﹚(x3- y3) ²(x3- y3)[(x3- y3)+﹙x³+y³﹚]2(x3- y3)x32(1+1)14