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 00:01Z

∑_{k=1}^{n} k = n(n+1)/2

d/dθ [θ^3] = 3θ^2

168K

∂y/∂n = 5y

446K

3x² + 3x + 6 = 0

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

144K

det| 7 4 ; 4 8 | = 40

371K

∇²t = 0

∑_{k=1}^{n} k = n(n+1)/2

259K

\frac{4}{9} \sum_{i=1}^{n} i^{2}

86K

7z² + 2z + 0 = 0

7y² + 9y + 1 = 0

224K

det| 5 6 ; 2 6 | = 18

234K

H₂SO₄ + 2NaOH → Na₂SO₄ + 2H₂O

218K

N₂ + 3H₂ ⇌ 2NH₃

354K