Field Notes / Σ /sym/3cad98
id=1 · host=formula-vault.cloud · 2026-10-19 20:25Z
\binom{n}{k} = \frac{n!}{k!(n-k)!}
∫₀^∞ e^(-r²) dr = √π / 2
46K
CaCO₃ → CaO + CO₂
H₂SO₄ + 2NaOH → Na₂SO₄ + 2H₂O
278K
e^{i\pi} + 1 = 0
∑_{k=1}^{n} k = n(n+1)/2
177K
∂x/∂r = 4x
\binom{n}{k} = \frac{n!}{k!(n-k)!}
358K
CH₄ + 2O₂ → CO₂ + 2H₂O
121K
H₂SO₄ + 2NaOH → Na₂SO₄ + 2H₂O
det| 12 4 ; 4 13 | = 140
∑_{k=1}^{n} k = n(n+1)/2