Решите: (-2а^+a+2)(3a-1)= ,6y-(y-3)(y^-2)=,(2x-3)(x+4)-2x^=,(m-4)(m+4)+m(5-m)=,(x-8)^-(x-3)(x+3)=. 34 !

(-2а^2+a+2)(3a-1)=-6a^3+3a^2+6a+2a^2-a-2=-6x^3+5a^2+5a-2
6y-(y-3)(y^2-2)=6y-(y^3-3y^2-2y+6)=6y-y^3+3y^2+2y-6=-y^3+3y^2+8y-6
(2x-3)(x+4)-2x^2=2x^2-3x+8x-12-2x^2=5x-12
(m-4)(m+4)+m(5-m)=m^2-16+5m-m^2=5m-16
(x-8)^2-(x-3)(x+3)=x^2-16x+64-x^2+9=-16x+73