Помогите найти ошибку

#include <iostream.h>
 
#include <math.h>
 
int main()
{
double x, y, z, a, b, s;   // îáüÿâèëà ïåðåìåííûå.
cout << "Vvedite x:";     // ââîä çíà÷åíèé
cin >> x;
cout << "Vvedite y:";
cin >> y; 
cout << "Vvedite z:";
cin >> z;
a=sqrt(y+(x-1, 1/3.), 1/4.);     // âû÷èñëåíèå âûðàæåíèÿ
b=fabs(x-y)*pow(sin,2(z)+tan(z);
s=a/b
cout << "Result h="<<h<<endl;   // âûâîä ðåçóëüòàòà
    return 0;          // çàâåðøåíèå ïðîãðàììû
}

#include <iostream>
 
#include <math.h>
#include <stdlib.h>
using namespace std;
 
int main()
{
double x, y, s;
cout <<"Vvedite x:";
cin >>x;
cout <<"Vvedite y:";
cin >>y;
if (x/y>0)
{
    s=pow(x+log(fabs(y)),(1 * 1.0 / 3));
    cout <<"1 vetv. Result="<<s<<endl;
}
else if (x/y<0)
{
    s=fmod(2,3)+log(fabs(sin(y));
    cout <<"2 vetv. Result="<<s<<endl;
}
else    
{
    s=sqrt((x*x), (1 * 1.0 / 3)+abs(y));
    cout <<"2 vetv. Result="<<s<<endl;
return 0;
}

    s = 2.0 / 3 + log(fabs(sin(y));

    s = pow(x, 2.0 / 3) + y;

#include <iostream>
#include <cmath>
#include <cstdlib>

#include <iostream>
#include <math.h>
#include <stdlib.h>
using namespace std;
int main() {
    double x, y, z, a, b, c, s;
    cout << "Vvedite x:";
    cin >> x;
        cout << x << endl;
    cout << "Vvedite y:";
    cin >> y;
        cout << y << endl;
    cout << "Vvedite z:";
    cin >> z;
        cout << z << endl;
 
    a = pow((x-1), (1 * 1.0 / 3));   //÷òîáû âû÷èñëèòü êîðåíü n-íîé 
    b = pow((a+y), (1 * 1.0 / 4));  //ñòåïåíè íóæíî ÷èñëî âîçâåñòè â ñòåïåíü (1/n)
    c = abs(x-y)*(pow(sin(z), (1.0*2))+tan(z));
    s = b/c;
    cout << "Result s="<<s<<endl;
        system("pause");
    return 0;
}

#include <iostream>
#include <cmath>
#include <cstdlib>
 
int main()
{
double x, y, s;
cout <<"Vvedite x:";
cin >>x;
cout <<"Vvedite y:";
cin >>y;
if (x/y>0)
{
    s=pow(x+log(fabs(y)),3);
    cout <<"1 vetv. Result="<<s<<endl;
}
else if (x/y<0)
{
    s=2.0/3+log(fabs(sin(y));
    cout <<"2 vetv. Result="<<s<<endl;
}
else    
{
    s=pow(x, 2.0 / 3)+y;
    cout <<"3 vetv. Result="<<s<<endl;
return 0;
}

    s = pow(y + pow(x - 1, 1.0 / 3), 1.0 / 4) / (fabs(x - y) * (pow(sin(z), 2) + tan(z)))

    v = x / y; // x, y - вещественные
    if (v > 0.0)
        s = x + pow(log(fabs(y)), 3.0);
    else if(v < 0.0)
        s = 2.0 / 3 + log(fabs(sin(y)));
    else
        s = pow(x, 2.0 / 3) + y;
    
    cout << "sum: " << s << endl;