Field Notes / Σ /sym/3cad98
id=1 · host=formula-vault.cloud · 2026-10-19 00:20Z
4y² + 8y + 1 = 0
\binom{n}{k} = \frac{n!}{k!(n-k)!}
46K
2H₂ + O₂ → 2H₂O
AgNO₃ + NaCl → AgCl↓ + NaNO₃
289K
\frac{10}{7} \sum_{i=1}^{n} i^{2}
H₂SO₄ + 2NaOH → Na₂SO₄ + 2H₂O
11K
det| 7 3 ; 6 8 | = 38
144K
det| 12 7 ; 5 13 | = 121
97K
AgNO₃ + NaCl → AgCl↓ + NaNO₃
338K
\lim_{ψ\to 0} \frac{\sin ψ}{ψ} = 1
276K
∑_{k=1}^{n} k = n(n+1)/2
348K