In Real/Integer expressions, Bidmas is not followed - calculations are done in order, so use brackets.
+ Add
- Subtract
* Multiply
/ Divide
^ Power
POW Power
SUM Add
Note: care must be taken with the minus to distinguish between the subtract operator and a negative number. Because of the brute-force nature of the calculation logic, 2 * - 3 becomes 2 - 3 (result = -1), whereas 2 * -3 gives a correct result of -6. (Notice the position of the spaces: minus surrounded by spaces is an operator, otherwise it's a negative number).
In Boolean expressions, you may also use brackets and variables.
AND
OR
XOR
NOT