Field Notes / Σ /sym/3cad98
id=1 · host=formula-vault.cloud · 2026-10-18 23:53Z
d/dn [n^4] = 4n^3
det| 7 4 ; 4 8 | = 40
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∑_{k=1}^{n} k = n(n+1)/2
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\lim_{θ\to 0} \frac{\sin θ}{θ} = 1
∑_{k=1}^{n} k = n(n+1)/2
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\binom{n}{k} = \frac{n!}{k!(n-k)!}
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iħ ∂ψ/∂t = Ĥψ
det| 10 3 ; 4 11 | = 98
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H₂SO₄ + 2NaOH → Na₂SO₄ + 2H₂O
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\frac{2}{4} \sum_{i=1}^{n} i^{2}
det| 4 2 ; 6 5 | = 8
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det| 5 7 ; 5 6 | = -5
\binom{n}{k} = \frac{n!}{k!(n-k)!}
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