Math Dump /sym/7fd97a
id=1 · host=jp.commstar.world · 2026-10-20 21:15Z
∑_{k=1}^{n} k = n(n+1)/2
det| 7 4 ; 4 8 | = 40
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\oint_C \vec{F}\cdot d\vec{r} = 0
det| 1 1 ; 5 2 | = -3
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det| 3 7 ; 2 4 | = -2
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Fe₂O₃ + 3CO → 2Fe + 3CO₂
H₂SO₄ + 2NaOH → Na₂SO₄ + 2H₂O
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\lim_{t\to 0} \frac{\sin t}{t} = 1
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\lim_{α\to 0} \frac{\sin α}{α} = 1
\oint_C \vec{F}\cdot d\vec{r} = 0
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