7 times the cube of the sum of x and 8 Take this algebraic expression in 3 parts: The sum of x and 8 means we add 8 to x: x + 8 The cube of this sum means we raise the sum to the 3rd power: (x + 8)^3 7 times this cubed sum means we multiply (x + 8)^3 by 7: 7(x + 8)^3