Σ index Eq pack 19 Rxn set 20 Rxn set 26 Σ#24 Σ#12 Ledger /21 Eq pack 13 Ledger /3 Eq pack 1 Batch 16 Σ#18 Σ#6 Ledger /15 Batch 4

Field Notes / Σ /sym/3cad98

id=1 · host=formula-vault.cloud · 2026-10-20 00:50Z

∑_{k=1}^{n} k = n(n+1)/2

7y² + 9y + 1 = 0

168K

\binom{n}{k} = \frac{n!}{k!(n-k)!}

446K

3x² + 3x + 6 = 0

∑_{k=1}^{n} k = n(n+1)/2

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∇ × E = −∂B/∂t

371K

∇²t = 0

N₂ + 3H₂ ⇌ 2NH₃

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Fe₂O₃ + 3CO → 2Fe + 3CO₂

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7z² + 2z + 0 = 0

6r² + 3r + 1 = 0

224K

∫₀^∞ e^(-x²) dx = √π / 2

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det| 4 2 ; 5 5 | = 10

det| 7 4 ; 4 8 | = 40

218K

11t² + 9t + 4 = 0

2H₂ + O₂ → 2H₂O