Составить программу для вычисления функции

#include<iostream>
#include <cmath>
using namespace std;
 
int main()
{
 const double a=0.5,t=2.2;
 double x,y;
 cout<<"Vvedite x:"<<endl;
 cin>>x;
 if (fabs(x)>a) {y=log*log*log*x+(x*x);}
 else if (fabs(x)=a) {y=sqrt(x+t)+1/x;}
 else (fabs(x)<a) {y=cos(x)+t*sin*sin*x;}
 cout<<"y="<<y<<endl;
}

#include <iostream>
#include <cmath>
using namespace std;
 
const double a = 0.5;
const double t = 2.2;
 
double function_1(double x) { return pow(log(x),3.0)+pow(x,2.0); }
double function_2(double x) { return sqrt(x+t)+1/x; }
double function_3(double x) { return cos(x)+t*pow(sin(x),2.0); }
 
void main()
{
    double x;
    cout << "x = ";
    cin >> x;
    if(abs(x)>a) cout << "\n(lgx)^3 + x^2 = " << function_1(x) << "\n\n";
    else if(abs(x)==a) cout << "\nsqrt(x + t) + 1/x = " << function_2(x) << "\n\n";
    else cout << "\ncosx + t*(sinx)^2 = " << function_3(x) << "\n\n";
    system("pause");
}

#include <iostream>
#include <cmath>
using namespace std;
 
const double a = 0.5;
const double t = 2.2;
 
int function_1(double x) { return pow(log(x),3.0)+pow(x,2.0); }
int function_2(double x) { return sqrt(x+t)+1/x; }
int function_3(double x) { return cos(x)+t*pow(sin(x),2.0); }
 
void main()
{
    double x;
    cout << "x = ";
    cin >> x;
    if(abs(x)>a) cout << "\n(lgx)^3 + x^2 = " << function_1(x) << "\n\n";
    else if(abs(x)==a) cout << "\nsqrt(x + t) + 1/x = " << function_2(x) << "\n\n";
    else cout << "\ncosx + t*(sinx)^2 = " << function_3(x) << "\n\n";
    system("pause");
}

#include <iostream>
#include <cmath>
using namespace std;
 
int main()
{
    const double a=0.5,t=2.2;
    double x,y;
    cout<<"Vvedite x:"<<endl;
    cin>>x;
    if (fabs(x)>a) {y=pow(log(x),3.0)+pow(x,2.0);}
    else if (fabs(x)==a) {y=sqrt(x+t)+1/x;}
    else {y=cos(x)+t*pow(sin(x),2.0);}
    cout<<"y="<<y<<endl;
}