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0 My starting point was (A+D)*(A+B+C)*(~A+C+~D) And I should end at ~A*B*D +A*~D +C*D (according to online solvers.) But when I do it by hand on a paper I end up with this: ~A*B*D +A*~D +C*D +A*C And for the life of me I can't figure out how to simplify and get rid of the extra +A*C boolean-algebra share | cite | improve this question edited Dec 9 at 16:58 Rócherz 2,776 2 7 21 asked Dec 9 at 16:35 Andres Eelma 3 3