public class ArithmeticExpressions
{
	public static void main(String[] args)
	{
		double c=2, m=1, r=2, s=2,  x=5, y=3;
		double z;

		// (a)
		z = Math.sqrt(x*x + y*y);
		System.out.println("(a)  z = " + z);
		
		// (b)
		z = 4.0/3.0* Math.PI * Math.pow(r, 3);
		System.out.println("(b)  z = " + z);
		
		// (c)
		z = 1.0/c - x/3.0;
		System.out.println("(c)  z = " + z);
		
		// (d)
		z = Math.sqrt(1 + Math.pow(Math.tan(x), 2));
		System.out.println("(d)  z = " + z);
		
		// (e)
		z = 1.0/Math.sqrt(2*Math.PI*s*s)*Math.exp(-Math.pow(x-m, 2)/(2*s*s));
		System.out.println("(e)  z = " + z);
	}
}