Field Notes / Σ /sym/3cad98
id=1 · host=formula-vault.cloud · 2026-10-19 07:34Z
∑_{k=1}^{n} k = n(n+1)/2
\frac{6}{1} \sum_{i=1}^{n} i^{2}
∂x/∂θ = 8x
Fe₂O₃ + 3CO → 2Fe + 3CO₂
177K
∑_{k=1}^{n} k = n(n+1)/2
358K
∑_{k=1}^{n} k = n(n+1)/2
121K
det| 12 9 ; 5 13 | = 111
399K
det| 9 4 ; 1 10 | = 86
316K
∫₀^∞ e^(-t²) dt = √π / 2
11K