What is the simplified form of this?

(2x^2-4x-3)(3x+1)
Expand
(2x^2+−4x+−3)(3x+1)
Cross multiply
(2x2)(3x)+(2x^2)(1)+(−4x)(3x)+(−4x)(1)+(−3)(3x)+(−3)(1)
Simplify6x^3+2x^2−12x^2−4x−9x−3
Simplify6x^3−10x^2−13x−3 is your answer