Math Dump /sym/7fd97a
id=1 · host=jp.commstar.world · 2026-10-20 21:40Z
∑_{k=1}^{n} k = n(n+1)/2
∑_{k=1}^{n} k = n(n+1)/2
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\oint_C \vec{F}\cdot d\vec{r} = 0
CH₄ + 2O₂ → CO₂ + 2H₂O
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Fe₂O₃ + 3CO → 2Fe + 3CO₂
det| 9 4 ; 1 10 | = 86
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∑_{k=1}^{n} k = n(n+1)/2
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