(p？ Q)

((p→q)∧(q→p)) becomes conjunctive disjunction.

((? p∨q)∧(？ Q∨p)) becomes conjunctive disjunction.

(? p∨q)∨？ (p∨？ Q) de Morgan's law

(p∧？ q)∨(？ P∧q) De Morgan's Law

(p∧(？ p∨？ q))∨(((？ p∨？ Q)∧q) absorption rate is used in turn.

(p∨q)∧(？ p∨？ Q) distribution rate (? p∨？ Q) as a whole

(p∨q)∧？ (p∧q)

Question 4

(p∧？ q)∨(？ p∧q)

(p∧(？ p∨？ q))∨(((？ p∨？ Q)∧q) absorption rate is used in turn.

(p∨q)∧(？ p∨？ Q) distribution rate (? p∨？ Q) as a whole

(p∨q)∧？ (p∧q)