Can someone explain this

Solution= F= ( AV-B) -> ( C-SAAB) AL (MAV-B ) -> " ( CD AND ) VUL Pts= MPVE ( " AV-B ) - " ( " ( V CANBJ ) VAC ( AV-B) - ( MAC A - LAND ) )VOL - (AND) - (CA - LAMB JJVAL ( AND ) V C K " ANB )VOL By commutedive law ( CANB ) V - LAMB) ) Al VOL J -. . pv - P = T Hence CVAC = T TAT -.. ( ArB ) V - LAND ) = T T Hence this is required any