Field Notes / Σ /sym/3cad98
id=1 · host=formula-vault.cloud · 2026-10-19 07:33Z
∑_{k=1}^{n} k = n(n+1)/2
det| 9 4 ; 1 10 | = 86
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\frac{6}{1} \sum_{i=1}^{n} i^{2}
\frac{3}{2} \sum_{i=1}^{n} i^{2}
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∂x/∂θ = 8x
\binom{n}{k} = \frac{n!}{k!(n-k)!}
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\frac{2}{2} \sum_{i=1}^{n} i^{2}
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3φ² + 4φ + 2 = 0
\lim_{r\to 0} \frac{\sin r}{r} = 1
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