Field Notes / Σ /sym/3cad98
id=1 · host=formula-vault.cloud · 2026-10-20 03:45Z
∇ × E = −∂B/∂t
det| 9 4 ; 1 10 | = 86
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\binom{n}{k} = \frac{n!}{k!(n-k)!}
∂x/∂n = 6x
∑_{k=1}^{n} k = n(n+1)/2
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\lim_{x\to 0} \frac{\sin x}{x} = 1
∫₀^∞ e^(-θ²) dθ = √π / 2
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\binom{n}{k} = \frac{n!}{k!(n-k)!}
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\binom{n}{k} = \frac{n!}{k!(n-k)!}
∑_{k=1}^{n} k = n(n+1)/2
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H₂SO₄ + 2NaOH → Na₂SO₄ + 2H₂O
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N₂ + 3H₂ ⇌ 2NH₃
d/dy [y^6] = 6y^5
5y² + 1y + 3 = 0
6θ² + 9θ + 7 = 0