Field Notes / Σ /sym/3cad98
id=1 · host=formula-vault.cloud · 2026-10-20 03:20Z
∇ × E = −∂B/∂t
det| 5 3 ; 7 6 | = 9
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\binom{n}{k} = \frac{n!}{k!(n-k)!}
∑_{k=1}^{n} k = n(n+1)/2
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∂x/∂n = 6x
det| 9 4 ; 1 10 | = 86
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\lim_{x\to 0} \frac{\sin x}{x} = 1
det| 4 2 ; 6 5 | = 8
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