Math

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help please anyone?
i'm having a hard time solvig these problems

LOGIC CONDITIONAL PROOF. HOMEWORK HELP PLEASE!?
A.
1. A -> (B -> C)
2. (C ^ D) -> E
3. -F ->(D ^ -E) / :. A -> (B -> F)


B.
1. (A v B) -> -(C ^ D)
2. (-C v -D) -> (E <-> F)
3. (E <-> F) -> (G ^ H) / :. (A v B) -> (H ^ G)

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