#include <stdio.h>
#include <stdlib.h>
#include <math.h>

int main(void) {
	double rep1,rep2,rep3,rep4,rep5,rep6;
	rep1=sqrt(fabs(log(0.5)));
	rep2=sin(M_PI/6.0);
	rep3=atan(pow(13,2));
	rep4=pow(exp(-1),4);
	rep5=log(-3);
	rep6=pow(sqrt(2),2);
	printf("%f\n",rep1);
	printf("%f\n",rep2);
	printf("%f\n",rep3);
	printf("%f\n",rep4);
	printf("%f\n",rep5);
	printf("%f\n",rep6);
    return EXIT_SUCCESS;
}