Simplify (97 + (-21)) + ext... by applying commutative and associative properties.

Let's continue with Q5, part d).

5. Simplify by applying commutative and associative properties.

d) $(97 + (-21)) + \text{...}$
The expression provided in the image for part d) is incomplete. I will simplify the visible portion.

Step 1: Perform the addition inside the parentheses.

$$97 + (-21) = 97 - 21 = 76$$

The visible part of the expression simplifies to 76. Since the expression is incomplete, a final overall answer cannot be determined.
Answer: The visible part simplifies to 76.