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 00:06Z

∑_{k=1}^{n} k = n(n+1)/2

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

168K

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

446K

3x² + 3x + 6 = 0

8ψ² + 7ψ + 0 = 0

144K

∇ × E = −∂B/∂t

371K

∇²t = 0

∇ × E = −∂B/∂t

259K

det| 11 9 ; 0 12 | = 132

86K

7z² + 2z + 0 = 0

C₆H₁₂O₆ → 2C₂H₅OH + 2CO₂

224K

\lim_{ω\to 0} \frac{\sin ω}{ω} = 1

234K

det| 4 2 ; 5 5 | = 10

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

218K

11t² + 9t + 4 = 0

2H₂ + O₂ → 2H₂O