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 14:44Z

∑_{k=1}^{n} k = n(n+1)/2

1θ² + 2θ + 6 = 0

244K

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

52K

det| 12 5 ; 4 13 | = 136

det| 7 4 ; 4 8 | = 40

90K

d/dx [x^5] = 5x^4

91K

H₂SO₄ + 2NaOH → Na₂SO₄ + 2H₂O

det| 7 7 ; 4 8 | = 28

100K

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

50K

det| 4 9 ; 7 5 | = -43

det| 4 8 ; 3 5 | = -4

137K

N₂ + 3H₂ ⇌ 2NH₃

197K

det| 1 1 ; 3 2 | = -1

ω = 2πf

262K

det| 2 4 ; 4 3 | = -10

196K

∑_{k=1}^{n} k = n(n+1)/2

218K

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