-(-5)•(-5-6)

Let's simplify the expression step by step:

1. Start with the expression: \(-(-5) \cdot (-5 - 6)\).
2. Simplify the first part: \(-(-5) = 5\).
3. Now simplify the second part: \(-5 - 6 = -11\).
4. Now substitute these values back into the expression: \(5 \cdot (-11)\).
5. Finally, calculate the multiplication: \(5 \cdot (-11) = -55\).

So, the final result is \(-55\).