Infix –> Postfix

Input: A-B*(C+D)/E
Output:ABCD+*E/-

Infix –> Prefix

Input: A-B*(C+D)/E
Output: -A/*B+CDE

Postfix Value

Input: 629*3/+42*+8-
Output: 12

Prefix Value

Input: +*23*45
Output: 26

Infix Value

Input: 2+3*4+5@
Output: 19