tcfail036.hs:8:10: error: [GHC-59692]
    Duplicate instance declarations:
      instance Num NUM -- Defined at tcfail036.hs:8:10
      instance Num NUM -- Defined at tcfail036.hs:10:10

tcfail036.hs:11:13: error: [GHC-83865]
    • Expecting one more argument to ‘Num’
      Expected a type, but ‘Num’ has kind ‘* -> Constraint’
    • In the first argument of ‘Eq’, namely ‘Num’
      In the instance declaration for ‘Eq Num’