C++ :: Adding And Multiplying Polynomials - Linked List And Operation Overloading

I am having a bit of difficulty with implementing an object oriented program that uses both linked lists and operator overloading. The program calls for adding and multiplying polynomials together, with each single polynomial being represented as a node of a linked list (which is further a data member of an object of a class I have defined to implement this program). For example:

polynomial A will be: 3x^4 // 1 node of a linked list
polynomial B will be: 5x^2 // 1 node of a linked list
polynomial C will be blank for the time being. // empty list

Now, I need to use operator overloading so that this following line of code can be implemented:

C = A + B;

C should now be: 3x^4 + 5x^2.

The checklist of which parts of my code that work:

constructor works;
copy constructor works;
destructor works;
operator= works;
print function needs work but i can worry about that later;
operator* work on later

Here is my code:

#include <iostream>
using namespace std;
struct termNode {
int exp; // exponent
int coef; // coefficient
termNode * next;

[Code] ....

For the time being I need to add multiple nodes together (with the result being in descending order). So for example:

polyType a(2,3), b(4,5), c(6,7), d;
d = a + b + c;
d.print(); // should print out 7x^6 + 5x^4 + 3x^2, but it will only print out: 3x^2 + 7x^6