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 00:14Z

∑_{k=1}^{n} k = n(n+1)/2

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

168K

∑_{k=1}^{n} k = n(n+1)/2

446K

3x² + 3x + 6 = 0

det| 9 4 ; 1 10 | = 86

144K

det| 5 6 ; 2 6 | = 18

371K

∇²t = 0

CH₄ + 2O₂ → CO₂ + 2H₂O

259K

∇²β = 0

86K

11ψ² + 6ψ + 2 = 0

224K

\oint_C \vec{F}\cdot d\vec{r} = 0

234K

∑_{k=1}^{n} k = n(n+1)/2

218K

det| 4 7 ; 2 5 | = 6

354K

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

70K