Field Notes / Σ /sym/3cad98
id=1 · host=formula-vault.cloud · 2026-10-19 20:36Z
\binom{n}{k} = \frac{n!}{k!(n-k)!}
\lim_{r\to 0} \frac{\sin r}{r} = 1
46K
\binom{n}{k} = \frac{n!}{k!(n-k)!}
468K
CaCO₃ → CaO + CO₂
∑_{k=1}^{n} k = n(n+1)/2
289K
∫₀^∞ e^(-t²) dt = √π / 2
278K
e^{i\pi} + 1 = 0
∂x/∂r = 4x
H₂SO₄ + 2NaOH → Na₂SO₄ + 2H₂O
358K
H₂SO₄ + 2NaOH → Na₂SO₄ + 2H₂O
det| 7 4 ; 4 8 | = 40
399K
AgNO₃ + NaCl → AgCl↓ + NaNO₃
det| 12 4 ; 4 13 | = 140