program 8

#include<iostream>
#include<cmath>
using namespace std;
int main()
{
    float x, y;
    cout << "Write x" << endl;
    cin >> x;
    if ( (x=-1) || (x= 1))
        cout << "error" << endl;
    else
    {
        y = ((log(pow(pow(x, 2), 2) - 1)*log(1 + x)));
        cout << "y=" << y << endl;
    }
system("pause");
    return 0;
}