// CIS 610-251: Data Structures and Algorithms
// Assignment # 2 Question # 6
// Transform to infix

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


b) +-$ABC*D**EFG
    +-(A$B)C*D*(E*F)G
    +(A$B-C)*D(E*F*G)
    +(A$B-C)(E*F*G*D)
     (A$B-C)+(E*F*G*D)