#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("%d\n" , 15/2);
    return 0;
}

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