#include<stdio.h>
int main()
{

float x,y,z;
scanf("%f,%f",&x,&y);
if(x>0&&y>0)
z=double log(double x)+double log(double y);
else if(x<0&&y>0)
z=(double sin(double x)+double sin(double y));
else if(x<0&&y<0)
z=(double exp(double 2*x)+double exp(double 3*x));
else if(x>0&&y<0)
z=double tan(double (x+v));
printf("%.2f\n",z);
return 0;
}