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I'm a fairly young mathematics instructor devoting more time than I should here assisting others with often interesting mathematics questions. :<) Useful symbols (please copy and paste as needed): ∫ Σ → ∞ Π Δ Φ Ψ Ω Γ ∮ ∇∂ ± ∓ √ ∛ ∅ ° α β γ δ ε ζ η θ ι κ λ μ ν ξ ο π ρ σ τ υ φ χ ψ ω ⁰ ¹ ² ³ ⁴ ⁵ ⁶ ⁷ ⁸ ⁹ ⁺ ⁻ ⁿ ₀ ₁ ₂ ₃ ₄ ₅ ₆ ₇ ₈ ₉ ₊ ₋ ⅓ ⅔ ⅕ ⅖ ⅗ ⅘ ⅙ ⅚ ⅛ ⅜ ⅝ ⅞ ≡ ≈ ≅ ≠ ≤ ≥ · ~ ∤ ◅∈ ∉ ⊆ ⊂ ∪ ∩ ⊥ ô