Field Notes / Σ /sym/3cad98
id=1 · host=formula-vault.cloud · 2026-10-19 20:06Z
\binom{n}{k} = \frac{n!}{k!(n-k)!}
∑_{k=1}^{n} k = n(n+1)/2
46K
∑_{k=1}^{n} k = n(n+1)/2
468K
CaCO₃ → CaO + CO₂
H₂SO₄ + 2NaOH → Na₂SO₄ + 2H₂O
289K
e^{i\pi} + 1 = 0
det| 9 5 ; 1 10 | = 85
177K
∂x/∂r = 4x
det| 9 4 ; 1 10 | = 86
358K
\lim_{t\to 0} \frac{\sin t}{t} = 1
121K
H₂SO₄ + 2NaOH → Na₂SO₄ + 2H₂O
det| 2 7 ; 7 3 | = -43
399K
det| 12 4 ; 4 13 | = 140
\frac{4}{5} \sum_{i=1}^{n} i^{2}
∑_{k=1}^{n} k = n(n+1)/2
N₂ + 3H₂ ⇌ 2NH₃