Infix expression: A + B
prefix expression of above infix operation : +AB
similarly,
(A - B^C + H)*D + E^5
(A - (^BC) + H)*D + (^E5)
since + and - are of same priority so follow left to right associativity
((-A^BC) + H)*D + (^E5)
(+-A^BCH)*D +(^E5)
(*+-A^BCHD) + (^E5)
+*+-A^BCHD^E5