ta có : \(y'=\left(\left(x+1\right)\left(x+2\right)^2\left(x+3\right)^3\right)'\)
\(=\left(\left(x^3+5x^2+8x+4\right)\left(x^3+9x^2+27x+27\right)\right)'\)
\(=\left(x^3+5x^2+8x+4\right)'\left(x^3+9x^2+27x+27\right)+\left(x^3+5x^2+8x+4\right)\left(x^3+9x^2+27x+27\right)'\)
\(=\left(3x^2+10x+8\right)\left(x^3+9x^2+27x+27\right)+\left(x^3+5x^2+8x+4\right)\left(3x^2+18x+27\right)\)