Field Notes / Σ /sym/3cad98
id=1 · host=formula-vault.cloud · 2026-10-20 00:55Z
∑_{k=1}^{n} k = n(n+1)/2
3x² + 3x + 6 = 0
Fe₂O₃ + 3CO → 2Fe + 3CO₂
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∇²t = 0
7z² + 2z + 0 = 0
det| 2 7 ; 7 3 | = -43
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det| 4 2 ; 5 5 | = 10
∑_{k=1}^{n} k = n(n+1)/2
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2H₂ + O₂ → 2H₂O