Field Notes / Σ /sym/b26508
id=1 · host=uk.mattivster.me · 2026-10-19 03:22Z
\frac{1}{3} \sum_{i=1}^{n} i^{2}
∫₀^∞ e^(-t²) dt = √π / 2
66K
∑_{k=1}^{n} k = n(n+1)/2
\frac{7}{1} \sum_{i=1}^{n} i^{2}
87K
\lim_{φ\to 0} \frac{\sin φ}{φ} = 1
det| 9 7 ; 3 10 | = 69
174K
det| 7 4 ; 4 8 | = 40
61K
∇²x = 0
H₂SO₄ + 2NaOH → Na₂SO₄ + 2H₂O
380K
Fe₂O₃ + 3CO → 2Fe + 3CO₂
∑_{k=1}^{n} k = n(n+1)/2
392K