The length, width, and height of a rectangular prism can be represented by the expressions (x+3), (x+7) and (x-1). Write an expression to represent the surface area of the prism.

The surface area = 2LW + 2LH + 2WH where W = width, L = length and H = height

So here we have

Surface Area = 2 (x+3) (x+7) + 2 (x+3) (x-1) + 2 ((x+7) (x-1)

= 2x^2 + 20x + 42 + 2x^2 + 4x - 6 + 2x^2 + 12x - 14

= 6x^2 + 36x + 22