Math Dump /sym/7fd97a
id=1 · host=jp.commstar.world · 2026-10-20 21:13Z
∑_{k=1}^{n} k = n(n+1)/2
∑_{k=1}^{n} k = n(n+1)/2
75K
\oint_C \vec{F}\cdot d\vec{r} = 0
det| 7 4 ; 4 8 | = 40
276K
det| 4 4 ; 5 5 | = 0
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Fe₂O₃ + 3CO → 2Fe + 3CO₂
det| 11 9 ; 5 12 | = 87
191K
∫₀^∞ e^(-x²) dx = √π / 2
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\lim_{α\to 0} \frac{\sin α}{α} = 1