Following the discovery of a question to which the answer is 42, the same team has now reported a sum of three cubes equal to 3. As before, the result can be checked from Excel, linking to mpmath, via pyxll.
The mp-Eval function also allows values to be assigned to symbols, which can then be evaluated. In this example the letters a to d are replaced with the values in the cells to the right, and substituted into the function in cell A41:
Further discussion of the background to this problem can be found at The Math Less Travelled, which has links to on-line calculators to solve the problem summing to 42, and it is also pointed out that that the formula can be evaluated directly in Python:
Also worth a read is the Wikipedia article on the sum of three cubes, which contains further examples and numerous links.