Consider the following expression: 4+(−6)⋅2/−(−3)^2

To simplify the denominator of the expression \( -(-3)^2 \), we start by evaluating \((-3)^2\).

\[
(-3)^2 = 9
\]

Now, substituting this value back in, we have:

\[
-(-3)^2 = -9
\]

Thus, the simplified denominator is:

\[
\boxed{-9}
\]