Markdown use

Special symbols

Symbol	Express	Example
Subscript	a~2~	a2
Superscript	a^2^	a2
It's not equal to	≠	≠
Less than or equal to	≤	≤
Greater than or equal to	≥	≥
Multiplication sign	×	×
devide	÷	÷
fraction	½	½
left arrow	←	←
Right arrow	→	→
Two way left arrow	⇐	⇐
Two way right arrow	⇒	⇒
PI	π	π
alpha	α	α
beta	β	β
theta	θ	θ
lambda	λ	λ