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x² x³ xⁿ √ ∛ ∜ x0 x1 x2 xₙ ≠ ≈ ≤ ≥ ∝ π θ α β γ δ λ μ σ Δ Ω φ ± × ÷ · ∞ ° ∫ ∫₀¹ ∫₀^∞ ∫₋₁¹ ∮ Σ Σᵢ₌₀ⁿ Σᵢ₌₁ⁿ Π lim lim(x→0) lim(x→∞) log log₁₀ log₂ ln ∂ ∇ ∈ ∪ ∩ ⊂ ∉ ∀ ∃ → ⇒ ↑ ↓ ⟺ ↔