// CIS 610-251: Data Structures and Algorithms
// Assignment # 2 Question # 7
// Transform from postfix to infix

a) AB+C-
   A+BC-
  (A+B)-C


b) ABCDE-+$*EF*-
    ABC(D-E)+$*(E*F)-
    AB(C+D-E)$*(E*F)-
    AB$(C+D-E)*(E*F)-
    A*B$(C+D-E)(E*F)-
    A*B$(C+D-E)-(E*F)