Profit is the difference between revenue and cost. The revenue, in dollars, of a company that makes skateboards can be modeled by the polynomial 2 x cubed plus 30 x minus 130 The cost, in dollars, of producing the skateboards can be modeled by 2 x cubed minus 3 x minus 520 The variable x represents the number of skateboards sold. What expression represents the profit? (Updated)