Complete the sentences. Example: She was asked a lot of questions at the last English lesson. 1. I was given one last chance by my parents. (to give)

1)=64x^2+25y^2+128x+8xy
2)=7y^2+4xy-(4x^2+4xy+y)=7y^2+4xy-4x^2-4xy-y=7y^2-4x^2-y
3)=(25a^2-30ab+9b^2)(-5a+3b)=-125a^3+150a^2*b-45ab^2+75a^2*b-90ab^2+27b^3=-125a^3+225a^2*b-135ab^2+27b^3