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 00:51Z

∑_{k=1}^{n} k = n(n+1)/2

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

168K

8ψ² + 7ψ + 0 = 0

446K

3x² + 3x + 6 = 0

∇ × E = −∂B/∂t

144K

Fe₂O₃ + 3CO → 2Fe + 3CO₂

371K

∇²t = 0

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

259K

H₂SO₄ + 2NaOH → Na₂SO₄ + 2H₂O

86K

4t² + 3t + 3 = 0

224K

N₂ + 3H₂ ⇌ 2NH₃

234K

det| 5 6 ; 2 6 | = 18

218K

det| 3 7 ; 2 4 | = -2

354K

det| 12 9 ; 5 13 | = 111

70K