Final answer:
To simplify the expression y² / (4z⁴³) without parentheses, you multiply the exponents in the denominator, resulting in y² / (4z¹²).
Step-by-step explanation:
The question appears to be about simplifying exponential expressions, specifically exponents and denominators. The original expression provided is not clear, but if the goal is to write the expression y² / (4z⁴³) without parentheses, then one must simplify the exponent in the denominator. The expression inside the parentheses can be simplified as z⁴³, which translates to z¹² (as raising a power to a power means you multiply the exponents). Thus, the expression without parentheses becomes y² / (4z¹²).