Field Notes / Σ /sym/9d393e
id=721170 · host=formula-vault.cloud · 2026-08-30 16:46Z
Fe₂O₃ + 3CO → 2Fe + 3CO₂
\binom{n}{k} = \frac{n!}{k!(n-k)!}
22K
\binom{n}{k} = \frac{n!}{k!(n-k)!}
det| 6 2 ; 6 7 | = 30
381K
AgNO₃ + NaCl → AgCl↓ + NaNO₃
\frac{8}{6} \sum_{i=1}^{n} i^{2}
det| 11 4 ; 5 12 | = 112
82K