Field Notes / Σ /sym/b26508
id=1 · host=uk.mattivster.me · 2026-10-19 03:19Z
\frac{1}{3} \sum_{i=1}^{n} i^{2}
det| 1 4 ; 2 2 | = -6
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\binom{n}{k} = \frac{n!}{k!(n-k)!}
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∑_{k=1}^{n} k = n(n+1)/2
det| 7 4 ; 4 8 | = 40
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\lim_{φ\to 0} \frac{\sin φ}{φ} = 1
\frac{4}{6} \sum_{i=1}^{n} i^{2}
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∇²x = 0
Fe₂O₃ + 3CO → 2Fe + 3CO₂
∑_{k=1}^{n} k = n(n+1)/2
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