These are the packages that would be merged, in order:

Calculating dependencies ... done!
Dependency resolution took 1.51 s (backtrack: 0/20).

[ebuild     U  ] dev-libs/expat-2.8.5::gentoo [2.7.4::gentoo] USE="unicode -examples -static-libs -test" 516 KiB

Total: 1 package (1 upgrade), Size of downloads: 516 KiB