Ok, here goes ...
First, I used the Marquee Tool to select a big chunk of arm, and moved it up a bit (I lowered the opacity of the layer while doing this, so as to be sure it lined up ok. I also had to rotate it a tiny bit, I'm not sure if you can tell that in this screenshot):
Then I gently masked it in, to cover the extra creases in the armpit:
Next, I selected a big chunk of her flank, and again I moved it and rotated it (at temporary low opacity) to cover those wrinkles:
Then I gently masked it on:
In case it helps, here's a view of the mask on that layer:
Finally, I used the Handyman Method to tidy up the last of the shadowing (as already discussed, I think I made it a bit lighter than you prefer):
Hope this helps.