Answer:5xpower of 3 + 1 Step-by-step explanation:7x power of 3 -2x power of 3 + 1 (by combining like terms)since 7x and 2x are both power of 3 we are going to combine it therefore7x -2x power of 3 is equal to 5x power of 3 then bring down 1 therefore the final answer is5x power of 3 + 1