Field Notes / Σ /sym/3cad98
id=1 · host=formula-vault.cloud · 2026-10-19 07:57Z
∑_{k=1}^{n} k = n(n+1)/2
∑_{k=1}^{n} k = n(n+1)/2
46K
\frac{6}{1} \sum_{i=1}^{n} i^{2}
det| 9 5 ; 1 10 | = 85
289K
Fe₂O₃ + 3CO → 2Fe + 3CO₂
278K
∂x/∂θ = 8x
det| 9 4 ; 1 10 | = 86
177K
3φ² + 4φ + 2 = 0