阅读理解

Paul: Mother, this is my friend, John.

John: Nice to meet you, Mrs. Collins.

Paul: And these are my grandparents, Kevin and Eileen Collins. That's my

        brother, Richard, and this is my cousin, Ralph.

John: Hello, and is this your sister?

Paul: Yes, this is Carol.

根据对话内容,判断下列句子正(T)误(F)

( )1. John and Paul are friends.            

( )2. Mrs. Collins and John are cousins.    

( )3. Richard and Paul are cousins.          

( )4. Carol and Paul are sister and brother.

( )5. Kevin is Paul's father.

（1）一个多项式减去5mn+3m²得﹣2n²﹣4mn，求这个多项式．

（2）已知（x﹣2）²+|y+1|=0，求5xy²﹣[2x²y﹣（3xy²﹣2x²y）]的值．