Don't forget to write 2025 as 1³+2³+3³+4³+5³+6³+7³+8³+9³ (next opportunity is only in 3025)! (Or, for the #math and #LaTeX lovers: \begin{equation} \sum_{n=1}^9 n^3 \end{equation})
@revk@pfsmet Indeed. But including the brackets doesn't look nice. And the brackets could be removed, but then it's like you're subtracting 1³ rather than adding (-1)³.