Answer:

Let's simplify step-by-step.

x+(7)(5)x(2)−7x−4x−(3)(4)x3−x2+4x−3

=x+70x+−7x+−4x+−12x3+−x2+4x+−3

Combine Like Terms:

=x+70x+−7x+−4x+−12x3+−x2+4x+−3

=(−12x3)+(−x2)+(x+70x+−7x+−4x+4x)+(−3)

Answer:=−12x3+−x2+64x+−3

Hope its help