Field Notes / Σ /sym/3cad98
id=1 · host=formula-vault.cloud · 2026-10-19 20:09Z
\binom{n}{k} = \frac{n!}{k!(n-k)!}
∑_{k=1}^{n} k = n(n+1)/2
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det| 7 4 ; 4 8 | = 40
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CaCO₃ → CaO + CO₂
∫₀^∞ e^(-θ²) dθ = √π / 2
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e^{i\pi} + 1 = 0
∫₀^∞ e^(-t²) dt = √π / 2
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∂x/∂r = 4x
det| 5 3 ; 7 6 | = 9
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H₂SO₄ + 2NaOH → Na₂SO₄ + 2H₂O