Field Notes / Σ /sym/3cad98
id=1 · host=formula-vault.cloud · 2026-10-20 03:52Z
∇ × E = −∂B/∂t
\binom{n}{k} = \frac{n!}{k!(n-k)!}
∂x/∂n = 6x
∫₀^∞ e^(-θ²) dθ = √π / 2
259K
∫₀^∞ e^(-t²) dt = √π / 2
86K
\lim_{x\to 0} \frac{\sin x}{x} = 1
det| 12 1 ; 5 13 | = 151
224K
\binom{n}{k} = \frac{n!}{k!(n-k)!}
Fe₂O₃ + 3CO → 2Fe + 3CO₂
218K
N₂ + 3H₂ ⇌ 2NH₃
d/dy [y^6] = 6y^5
5y² + 1y + 3 = 0
6θ² + 9θ + 7 = 0