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

∑_{k=1}^{n} k = n(n+1)/2

446K

3x² + 3x + 6 = 0

det| 9 4 ; 1 10 | = 86

144K

∇²r = 0

371K

∇²t = 0

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

259K

det| 2 7 ; 7 3 | = -43

86K

4t² + 3t + 3 = 0

224K

H₂SO₄ + 2NaOH → Na₂SO₄ + 2H₂O

234K

∂γ/∂θ = 2γ

218K

λ = h/p

354K

det| 12 1 ; 5 13 | = 151

70K