Field Notes / Σ /sym/3cad98
id=1 · host=formula-vault.cloud · 2026-10-20 00:12Z
∑_{k=1}^{n} k = n(n+1)/2
\binom{n}{k} = \frac{n!}{k!(n-k)!}
168K
∑_{k=1}^{n} k = n(n+1)/2
446K
3x² + 3x + 6 = 0
Fe₂O₃ + 3CO → 2Fe + 3CO₂
371K
∇²t = 0
\frac{2}{2} \sum_{i=1}^{n} i^{2}
259K
AgNO₃ + NaCl → AgCl↓ + NaNO₃
86K
7z² + 2z + 0 = 0
det| 4 2 ; 5 5 | = 10
\lim_{ω\to 0} \frac{\sin ω}{ω} = 1
218K
det| 7 4 ; 4 8 | = 40
354K
2H₂ + O₂ → 2H₂O
iħ ∂ψ/∂t = Ĥψ
\lim_{x\to 0} \frac{\sin x}{x} = 1
11θ² + 6θ + 7 = 0