#include <stdio.h>
#include <stdlib.h>
#include <math.h>
int main(void) {
	printf("%lf\n", sqrt(fabs(log(0.5))));
	printf("%f\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;
}