W+X                 *+*
    X-Y                 A-W+Y

Complex relocatable expressions are used in A-type and Y-type address constants to generate address constant values. For more details, refer to “Complex relocatable expressions”, and Address constants—A and Y. V-type and S-type constants cannot contain complex relocatable expressions. You can assign a complex relocatable value to a symbol using the EQU instruction, as described in EQU instruction.