Operator Evaluation Order

Operator	Strength	Example
- (negation) NOT	Max.	f = - g ^ 2 is the same as ( - g ) ^ 2
IS	11
&	9
&/	8
^	7	i = 4 ^ 2 * 3 ^ 3 is the same as (4 ^ 2) * ( 3 ^ 3 )
* / \ DIV % MOD	6	i = 4 * 2 + 3 * 3 is the same as (4 * 2) + ( 3 * 3 )
+ -	5
= <> >= <= > < LIKE MATCH BEGINS ENDS	4	i = 4 + 2 = 5 + 1 is the same as ( 4 + 2 ) = ( 5 + 1 )
AND OR XOR	2	i = a > 10 AND a < 20 is the same as ( a > 10 ) AND ( a < 20 )

The stronger the operator, the earlier it is evaluated.

If in doubt, rather use brackets to group sub-expressions.