Doing a problem out of my book and not getting it right. Trying to figure out where I am going wrong.

The question is:

13(x-11)^2(x+7)^4+(x-11)^3(2)(x+7)^3

So the steps I have came up with. Where am I going wrong?

(x-11)^2(x+7)^3(13(x+7)+2(x-11)

Next Step

(x-11)^2(x+7)^3(13x+91)+(2x-22)

Next Step

(x-11)^2(x+7)^3(15x+69)

For a final answer.