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Answer: To express or evaluate the expression A = (a + b)^5 + √c using mathematical library functions in Java, we can utilize the Math.pow() function to raise (a + b) to the power of 5 and the Math.sqrt() function to calculate the square root of c. Here's a Java program to demonstrate this:

Explanation: import java.util.Scanner;

public class ExpressionEvaluation {

   public static void main(String[] args) {

       Scanner scanner = new Scanner(System.in);

       System.out.print("Enter the value of 'a': ");

       double a = scanner.nextDouble();

       System.out.print("Enter the value of 'b': ");

       double b = scanner.nextDouble();

       System.out.print("Enter the value of 'c': ");

       double c = scanner.nextDouble();

       // Calculate the expression A = (a + b)^5 + √c

       double result = Math.pow((a + b), 5) + Math.sqrt(c);

       System.out.println("The result of the expression A = (a + b)^5 + √c is: " + result);

       scanner.close();

   }

}

This program takes input values for 'a', 'b', and 'c' from the user, then calculates the expression A = (a + b)^5 + √c and prints the result. Note that for the square root calculation, ensure that the value of 'c' is non-negative, as the square root of a negative number is not defined in real numbers.

The code will be:

import java.util.Scanner;

public class ExpressionCalculator {

public static void main(String[] args) {

Scanner scanner = new Scanner(System.in);

System.out.print("Enter the value of 'a': ");

double a = scanner.nextDouble();

System.out.print("Enter the value of 'b': ");

double b = scanner.nextDouble();

System.out.print("Enter the value of 'c': ");

double c = scanner.nextDouble();

double result = calculateExpression(a, b, c);

System.out.println("Result: A = " + result);

scanner.close();

}

public static double calculateExpression(double a, double b, double c) {

// Calculate (a + b)^5 using Math.pow()

double abPower5 = Math.pow((a + b), 5);

// Calculate √c using Math.sqrt()

double sqrtC = Math.sqrt(c);

// Calculate A = (a + b)^5 + √c

double A = abPower5 + sqrtC;

return A;

}

}