Expand and Simplify

Lets start with (x+7)^2

Foil method works best here

x*x+x*7+x*7+7*7

x^2+14x+49

(2x-5)(x^2+14x+49) is next

(2x*x^2) + (2x*14x) + (2x*49) + (-5*x^2) + (-5*14x) + (-5*49)

2X^3+28X^2++98X-5x^2-70x-245

And, if we simplify SpawnofAngel's answer, we get :

2 x^3+23 x^2+28 x-245