1/27b^3 + a^9 = (1/3b + a^3)(1/9b^2 - 1/3ab + a^6)
25/169m^6 - 343/729n^3 = (5/13m^2 - 7/9n)(5/13m^2 + 7/9n)
(5b+4)^3 - 125 = (5b + 4 - 5)(25b^2 + 20b + 16 + 25b + 20 + 16) = (5b - 1)(25b^2 + 45b + 32)
16x^3 + (3x+2)^3 = (2x + 3)(4x^2 - 6x + 9)
1/27b^3 + a^9 = (1/3b + a^3)(1/9b^2 - 1/3ab + a^6)
25/169m^6 - 343/729n^3 = (5/13m^2 - 7/9n)(5/13m^2 + 7/9n)
(5b+4)^3 - 125 = (5b + 4 - 5)(25b^2 + 20b + 16 + 25b + 20 + 16) = (5b - 1)(25b^2 + 45b + 32)
16x^3 + (3x+2)^3 = (2x + 3)(4x^2 - 6x + 9)