1 簡化布林函數（Boolean function）F(A, B, C, D)=Σm(1, 2, 6, 9, 10, 11, 14)所得最簡的和之積表示式（product-of-sums expression）為：
(A)(A+C'+D') (B'+D') (C+D)
(B)(A+C'+D') (B'+C) (B'+D') (C+D)
(C)(A'+C+D) (B+C') (C'+D')
(D)(A'+C+D) (B+D) (C'+D')