Question: 5 . Prove this proof 1 . ( u ) ( Du ( ~Cu v Fu ) ) / ( w ) ( Fw v

5. Prove this proof
1.(u)(Du (~Cu v Fu))/(w)(Fw v ~(Ew & Gw))
2. ~(Ex) ~(Ex Dx)
3.(z)(~(~Cz ~Dz) ~Ez)

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