/// <summary>
/// Constructor
/// </summary>
/// <param name="numer">Polynomial expression for numerator</param>
/// <param name="denom">Polynomail expression for denomenator</param>
public PolyExpression(Polynomial numer, Polynomial denom)
{
numerator = numer;
denomenator = denom;
}
/// <summary>
/// Constructor to create and empty expression
/// </summary>
public PolyExpression()
{
numerator = new Polynomial();
denomenator = new Polynomial();
}