Subtract: (2u−7y)−(7u+2y)

To subtract the expression \((2u - 7y) - (7u + 2y)\), we first distribute the negative sign to the second expression:

\[ (2u - 7y) - (7u + 2y) = 2u - 7y - 7u - 2y \]

Next, we combine like terms:

For the \(u\) terms: \[ 2u - 7u = -5u \]

For the \(y\) terms: \[ -7y - 2y = -9y \]

Now, we can put it all together: \[ -5u - 9y \]

So the final answer is: \(\boxed{-5u - 9y}\)

This corresponds to the response "−5u−9y".