Field Notes / Σ /sym/3cad98
id=1 · host=formula-vault.cloud · 2026-10-19 00:10Z
4y² + 8y + 1 = 0
\binom{n}{k} = \frac{n!}{k!(n-k)!}
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∑_{k=1}^{n} k = n(n+1)/2
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2H₂ + O₂ → 2H₂O
AgNO₃ + NaCl → AgCl↓ + NaNO₃
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\frac{10}{7} \sum_{i=1}^{n} i^{2}
det| 9 7 ; 1 10 | = 83
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∫₀^∞ e^(-r²) dr = √π / 2
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det| 9 8 ; 0 10 | = 90
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det| 11 2 ; 2 12 | = 128
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det| 3 9 ; 7 4 | = -51
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det| 1 7 ; 7 2 | = -47
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\oint_C \vec{F}\cdot d\vec{r} = 0
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\lim_{ψ\to 0} \frac{\sin ψ}{ψ} = 1
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det| 4 3 ; 0 5 | = 20
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