#include <iostream>
#include <cmath>
using namespace std;
int main(){
float x = 1.9;
int a = 2;
float b = 1.1;
double e = 2.71828182846;
cout << log(a * pow(x, 3) + b) / pow(e, x + 1);
return 0;
}
#include <iostream>
#include <cmath>
using namespace std;
int main(){
float x = 1.9;
int a = 2;
float b = 1.1;
double e = 2.71828182846;
cout << log(a * pow(x, 3) + b) / pow(e, x + 1);
return 0;
}