/**
 * Write a description of class Core here.
 *
 * @author (your name)
 * @version (a version number or a date)
 */
public class Core
{

    /**
     * Constructor for objects of class Core
     */
    public Core()
    {
    }

    public static double add(double x, double y)
    {

        return x + y;
    }

    public static double subtract(double x, double y)
    {
        return x - y;
    }

    public static double divide(double x, double y)
    {
        return x / y;
    }

    public static double multiply(double x, double y)
    {
        return x * y;
    }

    public static double squareRoot(double x)
    {
        return Math.sqrt(x);
    }

    public static double exponentiation(double x, double y)
    {
        return Math.pow(x, y);
    }

    public static double inverse(double x)
    {
        return 1 / x;
    }

    public static double reverse(double x)
    {
        return -1*x;
    }

}