Factorize:
(x+1)2−(y−1)2
(x+2)(x2+25)−10x2−20x
Evaluate : ( 8a³ - 27b³ ) / ( 64x³ + y³ ) , where ( 64x³ + y³ ) ≠ 0
Evaluate (8a3−27b3)(64x3+y3), where (64x3+y3)≠0.