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

Calculating dependencies ... done!
Dependency resolution took 1.02 s (backtrack: 0/20).

[ebuild  N     ] sci-mathematics/cliquer-1.23::gentoo  USE="-static-libs" 455 KiB
[ebuild  N     ] sci-mathematics/nauty-2.9.3::gentoo  USE="threads -doc -examples" CPU_FLAGS_X86="popcnt" 5387 KiB

Total: 2 packages (2 new), Size of downloads: 5841 KiB