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 00:10Z

∑_{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

H₂SO₄ + 2NaOH → Na₂SO₄ + 2H₂O

144K

det| 7 2 ; 7 8 | = 42

371K

∇²t = 0

8ψ² + 7ψ + 0 = 0

259K

det| 5 2 ; 3 6 | = 24

86K

H₂SO₄ + 2NaOH → Na₂SO₄ + 2H₂O

224K

\lim_{x\to 0} \frac{\sin x}{x} = 1

234K

e^{i\pi} + 1 = 0

218K

∇ × E = −∂B/∂t

354K

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

70K