Field Notes / Σ /sym/3cad98
id=1 · host=formula-vault.cloud · 2026-10-20 00:03Z
∑_{k=1}^{n} k = n(n+1)/2
∑_{k=1}^{n} k = n(n+1)/2
168K
det| 12 9 ; 5 13 | = 111
446K
3x² + 3x + 6 = 0
∑_{k=1}^{n} k = n(n+1)/2
371K
∇²t = 0
Fe₂O₃ + 3CO → 2Fe + 3CO₂
86K
7z² + 2z + 0 = 0
det| 7 4 ; 4 8 | = 40
234K