Final answer:
The expression ((7 + 3) * 2) can be written in prefix notation as * + 7 3 2 and in postfix notation as 7 3 + 2 *.
Step-by-step explanation:
In prefix notation, the expression ((7 + 3) * 2) can be written as * + 7 3 2.
In postfix notation, the expression ((7 + 3) * 2) can be written as 7 3 + 2 *.