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Discrete mathematics to find the answer
the second question

P→(Q→R)

P∨(Q→R) becomes conjunctive disjunction.

P∨(? Q∨R) becomes conjunctive disjunction.

P∨? Q∞R associative law

(P∧Q)∨R De Morgan's Law

(P∧Q) → R

Third question

(? Q∧(P→Q))

(? Q∧(? P∨Q)) becomes conjunctive disjunction.

Q∨? (? De Morgan's law

Q∨(P∧? Q) de Morgan's law

Q∨P conjunctive disjunctive absorption rate

P∨Q commutative law

Get Lord conjunctive normal form.