Special Symbols - Copy Paste

⅛  ⅜  ⅓ ⅔  ¼  ½  ¾

≥  

→  ←  ↑ ↓ 

√



∛ ∜  ∝ ∟  ∠ ∡ ∢ ∣ ∤ ∥ ∦  ∧  ∨  ∩  ∪    ∫    ∬    ∭    ∮ 

http://www.mybloggertricks.com/2010/06/how-to-use-special-keyboard-characters.html

http://www.copypastecharacter.com/mathematical  - Other symbol sets are also available