Need kkaasshh if you see this or any one else

Each of the walls of a room with square dimensions has been built with two pieces of sheetrock, a smaller one and a larger one. the length of all the smaller ones is the same and is stored in the variable small. similarly, the length of all the larger ones is the same and is stored in the variable large. write a single expression whose value is the total area of this room. do not use any method invocations.

It says factor each expression 49x-28?

Consider that lines b and c are parallel. what is the value of x? what is the measure of the smaller angle?