**Copy a symbol below and paste into the UPchieve chat window.** On MS Windows you can type in an alt code instead, on Mac OS you can open an on-screen keyboard and press the character. None of these options is particularly speedy, especially when using multiple symbols. Not all characters exist, including apparently a subscript y or t.

Commonly used Greek alphabet: θ, π, μ, σ, α, β, Δ, Σ, Φ, ρ, Ω, Γ, λ, τ, ψ, ω

Square root: √, two character combinations: ³√, ±√

Degree sign: °

Logic, sets: ⋂ ⋃ ⊂ ⊃ ⊗ ∵ ∴ ⋮ ∀ ∃

Equalities: ≠ ≤ ≥ ≅ ±

Superscripts: ⁰ ¹ ² ³ ⁴ ⁵ ⁶ ⁷ ⁸ ⁹ ᴬ ᵃ ᵇ ᵉ ᶠ ᵏ ⁿ ᵗ ᵝ ⁽ ⁺ ⁻ ⁾ 

Subscripts: ₀ ₁ ₂ ₃ ₄ ₐ ₑ ᵢ ₒ ᵣ ₓ ᵦ ᵧ ᵨ

Italics: //abcdefghijklmnopqrstuvwxyz ABCDEFGHIJKLMNOPQRSTUVWXYZ//

Geometry: → ⊢ 

Calculus: ∫ ∞

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These are nice, but students also seem to be comfortable seeing x^2 for x², sqrt(x) for √x, writing out theta, etc. The less-than sign (<) is used for angle sign (geometry). 

Mixing cases or just combining letters can sometimes substitute for subscripts: vI instead of vᵢ. This can be a little confusing, often using spaces to better separate the terms is helpful.

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