Jack is mowing a lawn that has a shed. Jack wants to know the area of the lawn he has to mow. The dimensions of the yard are in the pic. Find a polynomial that describes the area the lawn he has to mow. Then combine like terms you should only have two terms in your polynomial in your final answer. Show all steps. Thank you :)

13x-4 Find a polynomial that es the area of the - has to mow. (i.e. find the area of the yard minus the area of the shed.)