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 00:26Z

∑_{k=1}^{n} k = n(n+1)/2

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

168K

det| 7 4 ; 4 8 | = 40

446K

3x² + 3x + 6 = 0

CH₄ + 2O₂ → CO₂ + 2H₂O

144K

∫₀^∞ e^(-x²) dx = √π / 2

371K

∇²t = 0

H₂SO₄ + 2NaOH → Na₂SO₄ + 2H₂O

259K

d/dx [x^9] = 9x^8

86K

7z² + 2z + 0 = 0

CH₄ + 2O₂ → CO₂ + 2H₂O

224K

det| 11 4 ; 5 12 | = 112

234K

det| 4 2 ; 5 5 | = 10

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

218K

N₂ + 3H₂ ⇌ 2NH₃

354K

11ψ² + 6ψ + 2 = 0

70K

∑_{k=1}^{n} k = n(n+1)/2

402K

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