Reaction Log /sym/649cc0
id=1 · host=co.gridbatch.net · 2026-10-17 23:59Z
∑_{k=1}^{n} k = n(n+1)/2
\frac{6}{7} \sum_{i=1}^{n} i^{2}
∑_{k=1}^{n} k = n(n+1)/2
\frac{4}{9} \sum_{i=1}^{n} i^{2}
119K
\binom{n}{k} = \frac{n!}{k!(n-k)!}
152K
\oint_C \vec{F}\cdot d\vec{r} = 0
173K
\frac{8}{6} \sum_{i=1}^{n} i^{2}
314K
det| 9 6 ; 7 10 | = 48
180K