Field Notes / Σ /sym/3cad98
id=1 · host=formula-vault.cloud · 2026-10-19 07:51Z
∑_{k=1}^{n} k = n(n+1)/2
det| 9 4 ; 1 10 | = 86
46K
\binom{n}{k} = \frac{n!}{k!(n-k)!}
468K
\frac{6}{1} \sum_{i=1}^{n} i^{2}
H₂SO₄ + 2NaOH → Na₂SO₄ + 2H₂O
289K
∂x/∂θ = 8x
Fe₂O₃ + 3CO → 2Fe + 3CO₂
339K
\frac{8}{6} \sum_{i=1}^{n} i^{2}
358K
det| 2 8 ; 7 3 | = -50
399K
\frac{3}{2} \sum_{i=1}^{n} i^{2}
387K