[Solved] Can someone explain to me this question in C [closed]

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As in boolean algebra + is OR you can simplify it with:

F = A*B*C*D + A*B*C*D + A*B*C*D + A*B*C*D    (A v A) = A
  = A*B*C*D + A*B*C*D + A*B*C*D              (A v A) = A
  = A*B*C*D + A*B*C*D                        (A v A) = A
  = A*B*C*D                                  (A v A) = A   

F = A*B*C + A*B*C + A*C*D + A*B*C*D          (A v A) = A
  = A*B*C + A*C*D + A*B*C*D
  = A*B*C + A*C*D 
  = A*C*(B + D)

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solved Can someone explain to me this question in C [closed]