#include <stdio.h>

int main() {
    
    //실습1//
  /*  printf("5*3/2\n");
    printf("7*7*3.14\n");
    printf("4.5*4.5*4.5\n"); */
  
    //실습3//
    printf("%d\n", 5+3);
    printf("%d\n", 7*2-4);
    printf("%f\n", 15.0/2.0);
    
    
    
    return 0;
}

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