1. The problem is to evaluate the expression $$(3x^2 - y^2)^3$$ for given values or to understand its form. 2. Since no specific values for $x$ and $y$ are provided, we consider the expression as is. 3. The expression is a cube of a binomial: $$(3x^2 - y^2)^3$$. 4. The multiple-choice options given are constants: 3, -3, -8, -1. 5. Without values for $x$ and $y$, the expression cannot be simplified to a constant. 6. The highlighted option is b) -3, but this does not correspond to the expression without further context. 7. If the question is to identify the coefficient or a specific value, more information is needed. Final answer: The expression $$(3x^2 - y^2)^3$$ cannot be evaluated to a constant without values for $x$ and $y$.