New answers tagged compounds
For the composition rules: 1 and 2 are ok. Case 1 is the normal choice in general, but you would prefer 2 over 1 if it leads to better readability, e.g. in cases of an unusual, unexpected composition. I think you already know this, because you linked to Hyphen for compound nouns: Mathe-Wettbewerb or Mathewettbewerb?, and the answers there explain it quite ...
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