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  1. public class NumberUtilities {
  2. public static String getRange(int stop) {
  3. return null;
  4. }
  5. public static String getRange(int start, int stop) {
  6. return null;
  7. }
  8. public static String getRange(int start, int stop, int step) {
  9. return null;
  10. }
  11. public static String getEvenNumbers(int start, int stop) {
  12. return null;
  13. }
  14. public static String getOddNumbers(int start, int stop) {
  15. return null;
  16. }
  17. public static String getExponentiations(int start, int stop, int exponent) {
  18. return null;
  19. }
  20. }