 Hi and welcome to the session. I am Neha and today I am going to help you with the following question. The question says p square q square minus 3pq plus 4 5 plus 7pq minus 3p square q square. Let's see the solution expressions. We will write the two expressions in separate rows with light terms one below the other. And light terms are those terms in which the variables are same and also the power of the variable is. So let's write the first expression that is 2p square q square minus 3pq plus so we have 2p square q square minus 3pq. Write the second expression that is 5 plus 7pq minus 3p square q square expressions. And let's see what we change to minus 3 and plus 7pq.