(9³-3³):3²

To solve this expression, let's first simplify the terms inside the parentheses: (9³ - 3³) : 3² Calculate the cube of 9 and 3: 9³ = 9 * 9 * 9 = 729 3³ = 3 * 3 * 3 = 27 Now replace those in the original expression: (729 - 27) : 3² Subtract 27 from 729: 729 - 27 = 702 Now, calculate the square of 3: 3² = 3 * 3 = 9 Next, we will divide the result of the parenthesis by 3² (which is 9): 702 : 9 Divide 702 by 9: 702 ÷ 9 = 78 Therefore, the final answer to the expression (9³ - 3³) : 3² is 78.