<|system|>
Simplify $(2-3z) - (3+4z)$.</s>.
<|user|>
Can you answer based on context?
<|assistant|>
We distribute the negative sign so the expression becomes \[
(2-3z) - (3+4z) = 2-3z-3-4z=2-3-3z-4z = -1-7z.
\]