The simplest value of this expression?

[Emerald123]

(Without using a calculator!)

I've been trying to find out a way of solving this problem without doing 10.10.10.10+324, 28.28.28.28+324, and so on.
I've noticed that all of the parentheses have +324 in them, that 22-10=12, 34-22=12 (and so on), and that 10-4=6, 22-16=6 (and so on). And there is the little work I did that can be seen in the image... Not sure if that helps much, though.
This problem might involve notable products... Or not.

Thank you in advance!

 

[stapel]

http://www.freemathhelp.com/forum/attachment.php?attachmentid=6657&stc=1

(Without using a calculator!)

I've been trying to find out a way of solving this problem....

I'm sorry, but the image isn't showing up. Please reply with the missing information. Thank you!