import java.util.*;
import java.util.Scanner;
public class CoreAl
{

    

    public double square(double number)
    {

        double sq=Math.pow(number,2);
        return sq;

   
    }
    //return square;



    public double squareroot(double number)
    {

        double sqroot=Math.sqrt(number);
        return sqroot;
    }

 

        public double exponent(double base,double power)
        {

        double exp=Math.pow(base,power);
        return exp;
    }

    

    
    public double inverse(double number)
    {

        return (1/number);
    }

    public double invertsign(double number)
    {

        return (number*-1);
    }

}

/*Catch(Exception e)
{
System.out.println("An error has occured");
}*/