Field Notes / Σ /sym/3cad98
id=1 · host=formula-vault.cloud · 2026-10-20 00:18Z
∑_{k=1}^{n} k = n(n+1)/2
∑_{k=1}^{n} k = n(n+1)/2
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3x² + 3x + 6 = 0
∇²t = 0
7z² + 2z + 0 = 0
det| 2 7 ; 7 3 | = -43
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det| 4 2 ; 5 5 | = 10
det| 7 6 ; 1 8 | = 50
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2H₂ + O₂ → 2H₂O
∫₀^∞ e^(-t²) dt = √π / 2
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