#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;}