Field Notes / Σ /sym/3cad98
id=1 · host=formula-vault.cloud · 2026-10-19 20:15Z
\binom{n}{k} = \frac{n!}{k!(n-k)!}
det| 7 4 ; 4 8 | = 40
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\lim_{ω\to 0} \frac{\sin ω}{ω} = 1
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CaCO₃ → CaO + CO₂
Fe₂O₃ + 3CO → 2Fe + 3CO₂
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Fe₂O₃ + 3CO → 2Fe + 3CO₂
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e^{i\pi} + 1 = 0
C₆H₁₂O₆ → 2C₂H₅OH + 2CO₂
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∂x/∂r = 4x
CH₄ + 2O₂ → CO₂ + 2H₂O
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∑_{k=1}^{n} k = n(n+1)/2
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H₂SO₄ + 2NaOH → Na₂SO₄ + 2H₂O
\binom{n}{k} = \frac{n!}{k!(n-k)!}
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\frac{12}{6} \sum_{i=1}^{n} i^{2}
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det| 12 4 ; 4 13 | = 140
\frac{4}{5} \sum_{i=1}^{n} i^{2}
∑_{k=1}^{n} k = n(n+1)/2