WeBWorK Standalone Renderer

Each large blue rectangle represents x, and each small orange square represents 1. Below, there are repeated groupings of one x and one or more 1's.

An expression for the value of one group =

An expression for all the groups put together is given by
$a \cdot (x+c)$ = $\cdot ( \;x\; +$ $)$

You can earn partial credit on this problem.