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 00:03Z

∑_{k=1}^{n} k = n(n+1)/2

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

168K

∑_{k=1}^{n} k = n(n+1)/2

446K

3x² + 3x + 6 = 0

det| 9 4 ; 1 10 | = 86

144K

∑_{k=1}^{n} k = n(n+1)/2

371K

∇²t = 0

C₆H₁₂O₆ → 2C₂H₅OH + 2CO₂

259K

∂y/∂n = 5y

86K

7z² + 2z + 0 = 0

det| 11 9 ; 0 12 | = 132

224K

CaCO₃ → CaO + CO₂

234K

11ψ² + 6ψ + 2 = 0

218K

d/dt [t^3] = 3t^2

354K