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 00:59Z

∑_{k=1}^{n} k = n(n+1)/2

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

168K

det| 5 6 ; 2 6 | = 18

446K

3x² + 3x + 6 = 0

6n² + 7n + 6 = 0

144K

12y² + 5y + 7 = 0

371K

∇²t = 0

iħ ∂ψ/∂t = Ĥψ

259K

∇²z = 0

86K

8ψ² + 7ψ + 0 = 0

224K

\frac{4}{6} \sum_{i=1}^{n} i^{2}

234K

det| 2 8 ; 7 3 | = -50

218K

N₂ + 3H₂ ⇌ 2NH₃

354K

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

70K