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

int main(void){
	printf("%lf\n",sqrt(fabs(log(0.5))));
	printf("%lf\n",sin(M_PI/6));
	printf("%lf\n",atan(pow(13,2)));
	printf("%lf\n",pow(exp(-1),4) );
	printf("%lf\n",log(-3) );
	printf("%lf\n",pow(sqrt(2),2));

	return EXIT_SUCCESS;
}