+  Addition operator (also concatenates strings)
-  Subtraction operator
*  Multiplication operator
/  Division operator
( ) Parentheses (used to group operands in expressions)
=  Assignment  operator
** Exponentiation operator
and Logical conjunction on two expressions
or Logical disjunction on two expressions
<> Not equal to
== Equal to
>= Greater or equal to
<= Less than or equal to
< Less than
> Greater than