(x^3+3)(x-x^3) найдите производную

((x^3+3)(x-x^3))'= -6x^5+4x^3-9x^2+3

((x^3+3)(x-x^3))'=(x^3+3)'*(x-x^3)+(x^3+3)*(x-x^3)'=3x^2*(x-x^3)+(x^3+3)*(1-3x^2)= =3x^3-3x^5+x^3+3-3x^5-9x^2=-6x^5+4x^3-9x^2+3