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/opensmt-2.9.2:0/2.9.2::gentoo  USE="-debug -libedit -test" 1429 KiB

Total: 1 package (1 new), Size of downloads: 1429 KiB