Question

what does the expression l+w+l+w represent

Answer 1

length + width+ length + width? I think..

Answer 2

that means legthn+lgnth +width+width

that is the perimeter formula for a rectangle or the measure around a rectangle

it can be written as (l-legnth)
perimiter=2l+2w or
p=2l+2w or
p=2(l+w)