To define an n-tuple (rather than a list of n objects), you can put the elements, separated by commas, inside the delimiters tuple[ and ]. For example:
| set[tuple[1,3,4],tuple[1,3,5],tuple[2,3,4]] | 
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You can compute the Cartesian product of two sets with the infixed * operator. For example:
| set[1,2]*set[3,4] | 
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| set[1,2]*set[3,4]*set[5,6] | 
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