Question: natural deduction problem! help please! 7. Use natural deduction to prove the following: (a) A, (AAX) (BAY) EXY (b) A X,Y V-BF(-XA-Y) (A1-B)

natural deduction problem! help please! 7. Use natural deduction to prove
natural deduction problem! help please!

7. Use natural deduction to prove the following: (a) A, (AAX) (BAY) EXY (b) A X,Y V-BF(-XA-Y) (A1-B)

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