1) a(3a^2+a)=?; 2)b(2b^3-7)=?; 3) -p^2(3g-2p)=? ; 4) 5(a^2-2ab+b^2)=?; 5) 2m(m^2-3m+3)=?; 6) -3(x^2+xy+y^2)=?; 7) a(a+b)-b(a-b)=?, 8) 2x(x-y)-y(y-2x)=?, 9) a(a^2-1)+a^2(a-1)=?              решите пожалуста(                             

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