Answer: To simplify the expression, let's start by evaluating each operation in order of operations (PEMDAS):
O 15: This is not a recognizable operation or symbol. Without further context, it's unclear what this means or how to simplify it.
O 23: Same as above.
O: This is not a recognizable operation or symbol either. Without further context, it's unclear what this means or how to simplify it.
5.4: This is already simplified.
29.4: This is already simplified.
[2(10-4)²+3] +5: We can simplify this using the order of operations. First, we evaluate the expression inside the brackets:
2(10-4)²+3 = 2(6)²+3 = 2(36)+3 = 75
Then we add 5:
[2(10-4)²+3] +5 = 75 + 5 = 80
Therefore, the simplified expression is:
5.4, 29.4, 80
Explanation: