Netgear AC1750 Model R6400 and TG862g

I have Xfinity triple play utilizing my own Arris TG682G modem.  The wireless capabilities of this modem – to put it politely -   suck . . . I therefore have searched several forums looking for a solution to this problem and located information on bridging a cable modem with a wireless router consequently, I purchased a Netgear 1750 R6400.    I am now SUPER FRUSTERATED attempting to configure these two electronic devices to work together.  I will gladly provide the infuriating process I have gone through in my attempt to bridge these devises however, I thought perhaps I would save you from the tears I sure you would shed on my behalf and first ask if anyone in this group has attempted this procedure and if they were successful.  -  (Devices in question:  Arris TG682G with a Netgear 1750 R6400).

Any recommendations other than trashing the entire system will be greatly appreciated.