Can anyone help, please? simplify cos(x-y)cos y - sin(x-y)sin y

I keep coming up with cos x, but for some reason I don't think that's right. Can anyone verify?

Recall that cos A cos B - sin A sin B = cos(A + B)

cos(x - y)cos(y) - sin(x - y)sin(y) = cos (x - y + y )

= cos(x)