I need your help in using the right verb construction in math text.
What verb should I use to describe this expression?
c+d define/express/point/recognize/indicate as v
edit 1: Guys, I know, c plus d is equal to v.
Sometimes we define some part of the equation as a new variable to make our calculation easily.
Using (2) the (1) can be rewritten as x=a+b+v (3)
I am looking at a verb to describe (2). I am not sure that "lets "c+d" define as "v" " can be correct