To obtain DNF, we can preform a series of transformations: F→GF⟺G¬(F∨G)¬(F∧G)¬¬FF∧(G∨H)(F∨G)∧H⇒¬F∨G⇒(F→G)∨(G→F)⇒¬F∧¬G⇒¬F∨¬G⇒F⇒(F∧G)∨(F∧H)⇒(F∧H)∨(G∧H)