Answer:
This is a mathematical expression that involves exponents, parentheses, and subtraction. To simplify this expression, we need to follow the order of operations, which is:
Parentheses: Evaluate the expression inside the parentheses first.
Exponents: Evaluate the expression with exponents next.
Subtraction: Evaluate the expression with subtraction last.
Using this order, we can simplify the expression as follows:
12²-(9-7)³+6 = 12²-(2)³+6 = 12²-8+6 = 144-8+6 = 142
The expression 12²-(9-7)³+6 is equal to 142. Therefore, the missing value in the parentheses is 2. The expression can be rewritten as:
12²-(2)³+6 = 12²-(?)³+6