Field Notes / Σ /sym/3cad98
id=1 · host=formula-vault.cloud · 2026-10-19 20:25Z
\binom{n}{k} = \frac{n!}{k!(n-k)!}
\lim_{r\to 0} \frac{\sin r}{r} = 1
46K
det| 12 9 ; 5 13 | = 111
468K
CaCO₃ → CaO + CO₂
\binom{n}{k} = \frac{n!}{k!(n-k)!}
278K
e^{i\pi} + 1 = 0
∂x/∂r = 4x
det| 5 2 ; 3 6 | = 24
121K
H₂SO₄ + 2NaOH → Na₂SO₄ + 2H₂O
det| 12 4 ; 4 13 | = 140
\frac{4}{5} \sum_{i=1}^{n} i^{2}
∑_{k=1}^{n} k = n(n+1)/2