Hello, sstr!
A fascinating problem: four types of factoring are required.
Sum of Cubes: .
Difference of Squares: .
Common factors: .
Grouping: .
The problem becomes: .
. . . which reduces to: .
My apologies.
64a^3 + b^3
___________
16 a^2 - b^2
Divided by
16a^2b^2 - 4ab^3 + b^4
_______________________
4a^2 - ab + 12a - 3b
Sorry I don't know how to use the math function yet.