1) a (3a^2+a)=?; 2) b (2b^3-7)=?; 3) -p^2 (3g-2p)=?

1) a (3a^2+a)=3 а^3+a^22) b (2b^3-7)=2b^4-7b3) -p^2 (3g-2p)=-3p^2g+2p^34) 5 (a^2-2ab+b^2)=5a^2-10ab+5b^25) 2m (m^2-3m+3)=2m^3-6m^2+6m6) -3 (x^2+xy+y^2)=-3x^2-3xy-3y^27) a (a+b) -b (a-b)=a^2+ab-ab+b^2=a^2-b^28) 2x (x-y) -y (y-2x)=2x^2-2xy-y^2+2xy=2x^2-y^29) a (a^2-1)+a^2 (a-1)=a^3-a+a^3-a=2a^3-2a