Case in Latin mottoes e.g., "Lux et veritas"

Hi everyone,

I'm taking my Elementary Latin this fall, and I have bunch of questions with expressing "of", "with" and "and" in Latin.

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2)
Also, In Latin mottos with the structure "X and Y", for instance Yale's motto "Lux et veritas", do we put both entities in the accusative case, or nominative case?

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Thank you so much for your help in advance!!...

Case in Latin mottoes e.g., "Lux et veritas"