Field Notes / Σ /sym/3cad98
id=1 · host=formula-vault.cloud · 2026-10-19 01:17Z
\lim_{n\to 0} \frac{\sin n}{n} = 1
\binom{n}{k} = \frac{n!}{k!(n-k)!}
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ω = 2πf
\lim_{r\to 0} \frac{\sin r}{r} = 1
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det| 7 2 ; 7 8 | = 42
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det| 1 7 ; 1 2 | = -5
∑_{k=1}^{n} k = n(n+1)/2
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H₂SO₄ + 2NaOH → Na₂SO₄ + 2H₂O
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C₆H₁₂O₆ → 2C₂H₅OH + 2CO₂
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\frac{4}{9} \sum_{i=1}^{n} i^{2}
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det| 9 4 ; 1 10 | = 86
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