Field Notes / Σ /sym/3cad98
id=1 · host=formula-vault.cloud · 2026-10-20 00:50Z
∑_{k=1}^{n} k = n(n+1)/2
3x² + 3x + 6 = 0
det| 7 2 ; 7 8 | = 42
371K
∇²t = 0
7z² + 2z + 0 = 0
Fe₂O₃ + 3CO → 2Fe + 3CO₂
224K
det| 7 7 ; 4 8 | = 28
234K
det| 4 2 ; 5 5 | = 10