ChemCalc Dump /sym/93428e
id=1 · host=br.gridbatch.net · 2026-10-19 01:05Z
\binom{n}{k} = \frac{n!}{k!(n-k)!}
∇²ω = 0
\binom{n}{k} = \frac{n!}{k!(n-k)!}
det| 7 4 ; 4 8 | = 40
310K
Fe₂O₃ + 3CO → 2Fe + 3CO₂
det| 1 8 ; 4 2 | = -30
264K
2H₂ + O₂ → 2H₂O
∑_{k=1}^{n} k = n(n+1)/2
68K