Maths chapter 2.1

-What have you learnt in chapter 2.1?
In chapter 2.1 i learnt how to factorise the algebra and also expansion of algebric expression.

-What are the difficulties?
I don't understand some parts of the question with more than three brackets i also get mixed up by the signs . :p

-What you want to know more ?
Currently i still don't want to know more because i still can't handle the easier part of the algebra