Math Dump /sym/7fd97a
id=1 · host=jp.commstar.world · 2026-10-20 17:00Z
∑_{k=1}^{n} k = n(n+1)/2
∑_{k=1}^{n} k = n(n+1)/2
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8β² + 2β + 0 = 0
\binom{n}{k} = \frac{n!}{k!(n-k)!}
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det| 5 9 ; 7 6 | = -33
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∑_{k=1}^{n} k = n(n+1)/2
det| 7 4 ; 4 8 | = 40
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\lim_{r\to 0} \frac{\sin r}{r} = 1
det| 12 1 ; 1 13 | = 155
\lim_{α\to 0} \frac{\sin α}{α} = 1
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\frac{12}{6} \sum_{i=1}^{n} i^{2}
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N₂ + 3H₂ ⇌ 2NH₃
Fe₂O₃ + 3CO → 2Fe + 3CO₂
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∫₀^∞ e^(-θ²) dθ = √π / 2