Σ index Rxn set 8 Ledger /9 Σ#24 Ledger /3 Ledger /15 Σ#12 Matrix 11 Batch 22 Eq pack 19 Matrix 17 Eq pack 13 Batch 16 Ledger /27 Eq pack 7

Symbolic Index /sym/ea4bfa

id=1 · host=au.commstar.world · 2026-10-20 14:43Z

∑_{k=1}^{n} k = n(n+1)/2

∑_{k=1}^{n} k = n(n+1)/2

244K

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

52K

det| 12 5 ; 4 13 | = 136

det| 2 6 ; 0 3 | = 6

90K

det| 7 4 ; 4 8 | = 40

91K

H₂SO₄ + 2NaOH → Na₂SO₄ + 2H₂O

6x² + 6x + 1 = 0

100K

F = G m₁m₂ / r²

50K

det| 4 9 ; 7 5 | = -43

det| 5 6 ; 1 6 | = 24

137K

∑_{k=1}^{n} k = n(n+1)/2

197K

det| 1 1 ; 3 2 | = -1

∇ × E = −∂B/∂t

262K

5γ² + 9γ + 5 = 0

196K

det| 12 9 ; 3 13 | = 129

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

218K

λ = h/p

299K

F = ma

CaCO₃ → CaO + CO₂

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