4x-8y= 3pr+2p= 6a²-21x³y³= 14x7y²-21x³y³= 3x(a+2)-5(a+2)= 4x-8y= 3pr+2p= 6a²-21x³y³= 14x7y²-21x³y³= 3x(a+2)-5(a+2)=