#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"); */

    //실습2//
    /* printf("%d\n");*/

    //실습3//
   printf("%d\n,5+3");
   printf("%d\n",7*2-4);
   printf("%d\n",15/2);
    return 0;

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