( ¬ b * ( ¬ a + c ) ) + ( a * ¬ c )
= ( ¬ b + ( a * ¬ c ) ) * ( ( ¬ a + c ) + ( a * ¬ c ) )
= ( ¬ b + ( a * ¬ c ) ) * ( ( ( ¬ a + c ) + a ) * ( ( ¬ a + c ) + ¬ c ) )
= ( ¬ b + ( a * ¬ c ) ) * ( ( ¬ a + c + a ) * ( ¬ a + c + ¬ c ) )
= ( ¬ b + ( a * ¬ c ) ) * T * T
= ¬ b + ( a * ¬ c )