Field Notes / Σ /sym/3cad98
id=1 · host=formula-vault.cloud · 2026-10-19 00:09Z
4y² + 8y + 1 = 0
\binom{n}{k} = \frac{n!}{k!(n-k)!}
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2H₂ + O₂ → 2H₂O
\frac{5}{8} \sum_{i=1}^{n} i^{2}
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\oint_C \vec{F}\cdot d\vec{r} = 0
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\frac{10}{7} \sum_{i=1}^{n} i^{2}
det| 6 8 ; 0 7 | = 42
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det| 1 7 ; 7 2 | = -47
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det| 4 8 ; 7 5 | = -36
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\binom{n}{k} = \frac{n!}{k!(n-k)!}
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∑_{k=1}^{n} k = n(n+1)/2
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