1. **State the problem:** Simplify the expression $$(2 - z - 1) c^2 f y^2$$. 2. **Simplify inside the parentheses:** Combine like terms inside the parentheses. $$2 - z - 1 = (2 - 1) - z = 1 - z$$ 3. **Rewrite the expression:** Substitute the simplified parentheses back into the expression. $$ (1 - z) c^2 f y^2 $$ 4. **Explain the expression:** This expression is the product of the term $(1 - z)$ and the variables $c^2$, $f$, and $y^2$. There are no like terms to combine further, so this is the simplified form. 5. **Final answer:** $$ (1 - z) c^2 f y^2 $$