import java.util.Arrays;
import java.util.List;

public class FourthExercise {
    public static void main(String[] args) {
        List<Integer> list = Arrays.asList(11, -2, 42, -7, 56);

        int sumOfNumbers = list.stream()
                .mapToInt(it -> 2 * it * it - 5 * it + 6)
                .sum();

        System.out.println("Sum of numbers is: " + sumOfNumbers);
    }
}