Field Notes / Σ /sym/3cad98
id=1 · host=formula-vault.cloud · 2026-10-19 20:29Z
\binom{n}{k} = \frac{n!}{k!(n-k)!}
CaCO₃ → CaO + CO₂
∫₀^∞ e^(-θ²) dθ = √π / 2
289K
det| 9 4 ; 1 10 | = 86
278K
e^{i\pi} + 1 = 0
det| 11 4 ; 5 12 | = 112
339K
∂x/∂r = 4x
det| 3 6 ; 0 4 | = 12
358K
∑_{k=1}^{n} k = n(n+1)/2
121K
H₂SO₄ + 2NaOH → Na₂SO₄ + 2H₂O
det| 12 1 ; 5 13 | = 151
399K
AgNO₃ + NaCl → AgCl↓ + NaNO₃
det| 12 4 ; 4 13 | = 140
\frac{4}{5} \sum_{i=1}^{n} i^{2}
∑_{k=1}^{n} k = n(n+1)/2