Field Notes / Σ /sym/3cad98
id=1 · host=formula-vault.cloud · 2026-10-19 22:26Z
det| 5 1 ; 4 6 | = 26
\binom{n}{k} = \frac{n!}{k!(n-k)!}
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∑_{k=1}^{n} k = n(n+1)/2
\lim_{α\to 0} \frac{\sin α}{α} = 1
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\binom{n}{k} = \frac{n!}{k!(n-k)!}
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12φ² + 4φ + 4 = 0
Fe₂O₃ + 3CO → 2Fe + 3CO₂
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E = mc²
H₂SO₄ + 2NaOH → Na₂SO₄ + 2H₂O
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H₂SO₄ + 2NaOH → Na₂SO₄ + 2H₂O
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C₆H₁₂O₆ → 2C₂H₅OH + 2CO₂
∑_{k=1}^{n} k = n(n+1)/2
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det| 9 4 ; 1 10 | = 86
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\frac{4}{8} \sum_{i=1}^{n} i^{2}
CaCO₃ → CaO + CO₂