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

Calculating dependencies ... done!
Dependency resolution took 1.03 s (backtrack: 0/20).

[ebuild  N     ] sci-visualization/gnuplot-6.0.5::gentoo  USE="X cairo gd readline -amos (-aqua) -bitmap -doc -examples -gpic -latex -libcaca -libcerf -lua -metafont -metapost -qt6 -regis -tgif -wxwidgets" LUA_SINGLE_TARGET="lua5-1 -lua5-3 -lua5-4" 7400 KiB
[ebuild  N     ] sci-biology/probcons-1.12-r1::gentoo  43 KiB

Total: 2 packages (2 new), Size of downloads: 7442 KiB