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Solve the set of simultaneous linear equations
Make an awesome ramp for a tiny motorcycle stuntman
Rotate a Matrix by 90 degrees
Given a 4x4 matrix, swap the two middle columns
Get the area codes from a list of phone numbers
Determine if input is odd
Remove the polynomials that have positive real elements of their roots.
The Goldbach Conjecture, Part 2
Remove the vowels
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