AB+CD ∗ E−FG/∗∗

AB+CD ∗ E−F∗∗G/

AB+CD ∗ E−∗F∗G/

AB+CDE∗ −∗F∗G/

ABCDE$*/-

A-BCDE$*/-

ABC$ED*/-

A-BCDE$*/

Stack

Queue

Tree

Array

*AB/CD+

AB*CD/+

A*BC+/D

ABCD+/ *

Full parenthesized infix expression

Prefix expression

Partially parenthesized infix expression

More than one of these