void Loop( double &a_sum, int start, int finish )
{
    for (int x = start; x <= finish; ++x)
    {
        double y = (log((x*x + 1.0) / (x*x - 1))) + 1.2*x;
        a_sum += abs(y);
    }
}

void CalculateNew()
{
    double sum = 0.0;
    Loop( sum, -15, -2 );
    Loop( sum, 2, 15 );

    printf("New: %f\n", sum);
}

void Loop( double &a_sum, int start, int finish )
{
    if ( start <= 0 && 0 <= finish )
    {
        throw std::range_error("WTF&");
    }

    for (int x = start; x <= finish; ++x)
    {
        double y = (log((x*x + 1.0) / (x*x - 1))) + 1.2*x;
        a_sum += abs(y);
    }
}

    sum = 0;
    for (x=-15; x<=15; x++)
    {
    	if ( abs(x) != 1 )
    	{
            y=(log((x*x+1)/(x*x-1)))+1.2*x;
    	}
        l=abs(y);
        sum=sum+l;
    }