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

Calculating dependencies ... done!
Dependency resolution took 0.98 s (backtrack: 0/20).

[ebuild  N     ] sci-mathematics/fann-2.2.0-r2::gentoo  USE="-examples" 2232 KiB

Total: 1 package (1 new), Size of downloads: 2232 KiB