Final answer:
To rewrite the expression without parentheses, distribute the -5y⁶ to each term inside the parentheses. The expression -5y⁶ (2y²-6y+7) can be simplified to -10y⁸ + 30y⁷ - 35y⁶.
Step-by-step explanation:
To rewrite the expression without parentheses, we need to distribute the -5y⁶ to each term inside the parentheses.
-5y⁶ (2y²-6y+7) = -10y⁸ + 30y⁷ - 35y⁶
The expression can be simplified further by combining like terms, but it cannot be simplified any further without more information about the values of y.