Can u pls help me with C program

[pradeepkumaras]

Hi
Can u pls help me to write C code for multivariate polynomial multiplication. For example

Input=(x+y)^2;
Output=x^2+2*x*y+y^2;

Input=(a+b)^3;
Output=a^3+3*a^2*b+3*a*b^2 +b^3;

Thanx in advance
Pradeep