@Randy Dandy,
Quote:Please show your solution. Thanks.
The solution isn't so much a formula as the realisation that the equation x^3 + y^3 = 22.z^3
is constrained by the condition that the answer is the sum of variants of 2 sets of cubes.
Main article: Waring's problem
Every positive integer can be written as the sum of nine (or fewer) positive cubes. This upper limit of nine cubes cannot be reduced because, for example, 23 cannot be written as the sum of fewer than nine positive cubes:
23 = 2^3 + 2^3 + 1^3 + 1^3 + 1^3 + 1^3 + 1^3 + 1^3 + 1^3.
Main article: Fermat's last theorem
The equation x^3 + y^3 = z^3 has no non-trivial (i.e. xyz ≠ 0) solutions in integers. In fact, it has none in Eisenstein integers.[1]
Both of these statements are also true for the equation[2] x^3 + y^3 = 3z^3.
http://en.wikipedia.org/wiki/Cube_(algebra)