smart calc
 
∘
α
β
γ
ε
μ
π
σ
Σ
θ
≥
≤
≠
∀
∃
∈
∉
⊂
⊆
⊃
⊇
⊄
Δ
→
∠
 
°
⊥
≈
≅
∼
∞
i
×
÷
±
√
º
¹
²
³
⁻ ¹
e
∨
∧
∪
∩
∅
≡
↔
∴
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