A triangle has side lengths of left bracket, 9, v, minus, 7, w, right bracket(9v−7w) centimeters, left bracket, 7, v, plus, 10, x, right bracket(7v 10x) centimeters, and left bracket, 8, x, plus, 5, w, right bracket(8x 5w) centimeters. Which expression represents the perimeter, in centimeters, of the triangle?