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A'C' + A'C'D' + A'B' + BC
=A'C'(1 + D') + A'B' + BC
=A'C' + A'B' + BC
=A'C' + A'B' + (A + A')BC
=A'C' + A'B' + A'BC + ABC
=A'(B' + C' + BC) + ABC
=A'[B' + C'(B+B') + BC] + ABC
=A'[B' + B'C' + BC' + BC] + ABC
=A'[B'(1 + C') + B(C' + C)] + ABC
=A'[B' + B] + ABC
=A' + ABC
=A' (1 + BC) + ABC
=A' + A'BC + ABC
=A' + BC(A' + A)
=A' + BC
=A'C'(1 + D') + A'B' + BC
=A'C' + A'B' + BC
=A'C' + A'B' + (A + A')BC
=A'C' + A'B' + A'BC + ABC
=A'(B' + C' + BC) + ABC
=A'[B' + C'(B+B') + BC] + ABC
=A'[B' + B'C' + BC' + BC] + ABC
=A'[B'(1 + C') + B(C' + C)] + ABC
=A'[B' + B] + ABC
=A' + ABC
=A' (1 + BC) + ABC
=A' + A'BC + ABC
=A' + BC(A' + A)
=A' + BC
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