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• a^3+-b^3= (a+-b)(a^2-+ab+b^2) 16 angles would be 0,30,45,60,90 and add 90 to each of these until you get 270,300,315,330,360

  in How do you factor a^3 [plus/minus] b^3? Comment by william-stewart_60c1eed15ce2c June 2021