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 14:51Z

∑_{k=1}^{n} k = n(n+1)/2

∂n/∂θ = 3n

244K

∑_{k=1}^{n} k = n(n+1)/2

52K

det| 12 5 ; 4 13 | = 136

det| 7 7 ; 4 8 | = 28

90K

\oint_C \vec{F}\cdot d\vec{r} = 0

91K

H₂SO₄ + 2NaOH → Na₂SO₄ + 2H₂O

det| 7 4 ; 4 8 | = 40

100K

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

50K

det| 4 9 ; 7 5 | = -43

∑_{k=1}^{n} k = n(n+1)/2

137K

∫₀^∞ e^(-θ²) dθ = √π / 2

197K

det| 1 1 ; 3 2 | = -1

2β² + 9β + 3 = 0

262K

N₂ + 3H₂ ⇌ 2NH₃

196K

det| 12 9 ; 3 13 | = 129

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

218K

det| 3 8 ; 6 4 | = -36

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