public static long faculty(int max) {
    long fakultaet = 1;

    for (int zahl=1; zahl<=max; zahl++) {
        fakultaet = fakultaet * zahl;
    }
    return fakultaet;
}

public static long exp(int x)
{
    int limit = 10000;
    long result = 0;
    for (int n= 1; n<= limit; ++n)
    {
        result +=  (x^n)/(faculty(n));
    }
    return result;
}