Prefix/Infix/Postfix Notation

Convert the infix expression $A \times B + C \times D$ to prefix.

Evaluate the postfix expression: $5\ 3\ +\ 4\ *$

Evaluate the postfix expression: $8\ 2\ /\ 3\ +\ 7\ *$

Evaluate the postfix expression: $6\ 2\ 3\ +\ -\ 3\ 8\ 2\ /\ +\ *$

Which infix expression corresponds to the prefix expression $-\ *\ A\ B\ /\ C\ D$?

What is the postfix form of $A + B * C$?

Evaluate the prefix expression: $*\ +\ 3\ 4\ -\ 9\ 2$

Convert the infix expression $(A + B) \times (C - D)$ to postfix.