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

Calculating dependencies ... done!
Dependency resolution took 1.01 s (backtrack: 0/20).

[ebuild  N     ] sci-mathematics/form-4.3.1::gentoo  USE="gmp threads zlib -devref -doc -doxygen -emacs -mpi" 1437 KiB

Total: 1 package (1 new), Size of downloads: 1437 KiB