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July 1, 2016
Posted by **Adrian ,** on Monday, June 3, 2013 at 10:26am.

- College math 1 -
**Steve**, Monday, June 3, 2013 at 10:40amNo shortcuts here. Just start listing them, in order of number of elements:

{}

{x},{y},...

{x,y},{x,z},...

{x,y,z},{x,y,u},...

{x,y,z,u},{x,y,z,v},...

{x,y,z,u,v}