It's up to you. I just wanted to do a little PSA I guess.I don't think a single person would take it as you have, implying division (you must be an engineer or something along those lines). I've never seen an extended torque wrench, so I doubt anyone is connecting an extension to their torque wrench. It was simply the neatest way to make the post with hypens separating all the important information. The BBCode on this site is very limiting.
7.5 ft/lbs - 10 Nm looks better than 7.5 ft - lbs - 10 Nm or 7.5 ft-lbs - 10 Nm.
I even made sure to put a handy key in the first post in case anyone was confused:
ft/lbs = Foot Pounds - Nm = Newton Meters
Not sure what you mean by an extension to a torque wrench. I was just describing how a torque works. Any time you are applying a force about a rotational axis you are applying a torque, whether that's a chain driving a sprocket, your hand rotating a screwdriver, or a you pushing on a breaker bar to bust a lug nut loose. A torque wrench is just a way to measure the torque being applied to the fastener or bolt.