This is probably one of those dumb things where someone does it mathmatically and then erad posts "LOL NO EACH BUS SEAT HAS 4 LEGS AND THERE ARE 30 BUS SEATS LOLOLOLLOLOLOLLOL".
Anyway, without any of the retarded withholding-information crap, it should be:
7 * 2 + 7^3 * 4 + 7^4 * 4
...or 10990.
First off no there isnt a cath to it, and thankyou guys for the answer.
second,
intercourse! excuse my french
No no silly nopyo... excuse your Asian.
third, bus legs and driver dont count.
Feline smuggling franchise. It's a big problem in Asia - using kids to transport cats to various restaraunts.
Lol that is probally true jits.
Fourth,
um... to restaurants...? SO IT IS TRUE! chinese DO eat cats and dogs! 
If you want proof, go to google image search and take off your filters, then type in eating dog or somthing. I havent done it yet but I'm sure there will be at least a few pics on there. And it may be wierd to us but to them its normal to eat cat and dog because its their culture. Kinda like we eat cow but they are sacred over in the middle east. Thats prolly one of the reasons most of em' hate us...................
