#include <iostream>
#include <math.h>
using namespace std;
int main() {
double y;
int a, b, x, e;
cin>>a>>b>>x>>y>>e;
if (x<=a)
{
y=pow(e, a*x)-3.8*cos(pow(a+b*x, 2));
cout<<"x<=a; Res y="<<y;
}
else if (a<x<b)
{
y=a+log(pow(fabs(b+x), 2));
cout<<"a<x<b; Res y="<<y;
}
else if (x>=b)
{
y=pow(e, a*x)+b;
cout<<"x>=b; Res y="<<y;
}
return 0;
}
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