Symbolic Index /sym/ea4bfa
id=1 · host=au.commstar.world · 2026-10-20 22:27Z
F = G m₁m₂ / r²
∑_{k=1}^{n} k = n(n+1)/2
244K
∑_{k=1}^{n} k = n(n+1)/2
52K
\binom{n}{k} = \frac{n!}{k!(n-k)!}
∑_{k=1}^{n} k = n(n+1)/2
90K
2H₂ + O₂ → 2H₂O
det| 8 4 ; 0 9 | = 72
∑_{k=1}^{n} k = n(n+1)/2
137K