First of all, I am assuming you are connecting the WAN port of the wireless router to your hub, please correct me if my assumption is wrong.  Your wireless router is likely getting an WAN IP address like you said from your current DHCP server, however if your other DHCP server is giving out the same IP address ranges as your router (ie 192.168.2.xxx) then both your router and other gateway are likely trying to take 192.168.2.1 and so you'll probably never be able to access one of them.

Another thing to remember is that you likely cannot access the administration page of your router from the WAN side of the router.  You will need to access it from the wireless network or plug in a computer into one of the other (non-WAN) ports on the router to access the admin pages.

If you are just trying to use your wireless router as an access point (just to add wireless to your wired network) try plugging your hug into one of the non-WAN ports on your wireless router.

Find router on network
One needs often a symbol to denote the quotient of two (algebraic) objects. (e.g. quotient by a subgroup, subring, submodule etc.). In simple cases people use A/B. But when both A,B are complicated to write, this doesn't look good. e.g.  \mathcal{O}_{(V',0)}}/\mathcal{O}_{(V,0)}}

For some reasons people do not use just \frac{A}{B}. Is there some way to achieve the following:

$A$ raised a bit, then \Big/ then $B$ a bit lowered.
