Refactor pow method to use Math.pow

[MuhammadMuneebMubashar]

• I have read CONTRIBUTING.md.
• This pull request is all my own work -- I have not plagiarized it.
• All filenames are in PascalCase.
• All functions and variable names follow Java naming conventions.
• All new algorithms have a URL in their comments that points to Wikipedia or other similar explanations.
• All new algorithms include a corresponding test class that validates their functionality.
• All new code is formatted with clang-format -i --style=file path/to/your/file.java

[codecov-commenter]

Codecov Report

✅ All modified and coverable lines are covered by tests.
✅ Project coverage is 79.33%. Comparing base (0c79d33) to head (9c55572).

Additional details and impacted files

@@             Coverage Diff              @@
##             master    #7265      +/-   ##
============================================
+ Coverage     79.31%   79.33%   +0.01%     
- Complexity     6990     6991       +1     
============================================
  Files           781      781              
  Lines         22958    22956       -2     
  Branches       4510     4509       -1     
============================================
+ Hits          18210    18212       +2     
+ Misses         4020     4019       -1     
+ Partials        728      725       -3     

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