Field Notes / Σ /sym/3cad98
id=1 · host=formula-vault.cloud · 2026-10-20 00:05Z
∑_{k=1}^{n} k = n(n+1)/2
det| 6 6 ; 5 7 | = 12
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∑_{k=1}^{n} k = n(n+1)/2
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3x² + 3x + 6 = 0
∇²t = 0
∑_{k=1}^{n} k = n(n+1)/2
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7z² + 2z + 0 = 0
det| 9 4 ; 1 10 | = 86
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det| 4 2 ; 5 5 | = 10
2H₂ + O₂ → 2H₂O
det| 2 7 ; 7 3 | = -43
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\lim_{x\to 0} \frac{\sin x}{x} = 1