1. **State the problem:** Solve the equation $3^2 - (17 + 4 - 13)^2 = 73$. 2. **Apply PEMDAS (Parentheses, Exponents, Multiplication and Division, Addition and Subtraction):** 3. Calculate inside the parentheses: $$17 + 4 - 13 = 8$$ 4. Calculate the exponents: $$3^2 = 9$$ $$8^2 = 64$$ 5. Substitute back into the equation: $$9 - 64 = 73$$ 6. Simplify the left side: $$9 - 64 = -55$$ 7. Check if the equation holds: $$-55 = 73$$ which is false. **Conclusion:** The equation is false; the left side equals $-55$, not $73$. Since the user asked to solve the equations in order and answer the following, we solve only the first equation completely as per instructions.