#include <iostream>
using namespace std;
int main(void) {
float pi = 3.14159265359;
float x, y;
cout << "Enter value for x: ";
cin >> x;
y = (x * x / (pi * pi * (x * x + 1. / 2.))) * (1 + (x * x / (pi * pi * (x * x - 1. / 2.) * (x * x - 1. / 2.))));
cout << "y = " << y;
return 0;
}
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