UnicodeForMath
μ
x̄
σ
p̂
√
×
≠
≈
±
←
⇠
↑
→
↓
⇜
⇝
http://www.alanwood.net/unicode/arrows.html
http://nadeausoftware.com/articles/2007/11/latency_friendly_customized_bullets_using_unicode_characters
Not for math:
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