Field Notes / Σ /sym/3cad98
id=1 · host=formula-vault.cloud · 2026-10-19 20:03Z
\binom{n}{k} = \frac{n!}{k!(n-k)!}
∫₀^∞ e^(-r²) dr = √π / 2
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det| 7 4 ; 4 8 | = 40
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CaCO₃ → CaO + CO₂
\binom{n}{k} = \frac{n!}{k!(n-k)!}
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e^{i\pi} + 1 = 0
∑_{k=1}^{n} k = n(n+1)/2
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∂x/∂r = 4x
\binom{n}{k} = \frac{n!}{k!(n-k)!}
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H₂SO₄ + 2NaOH → Na₂SO₄ + 2H₂O
det| 12 4 ; 4 13 | = 140
det| 7 7 ; 4 8 | = 28
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∑_{k=1}^{n} k = n(n+1)/2