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

Calculating dependencies ... done!
Dependency resolution took 1.20 s (backtrack: 0/20).

[ebuild  N     ] sci-libs/suitesparseconfig-5.4.0::gentoo  USE="-static-libs" 252 KiB
[ebuild  N     ] virtual/fortran-0-r1::gentoo  USE="openmp" 0 KiB
[ebuild  N     ] sci-libs/gklib-5.1.1_p20230327-r1::gentoo  182 KiB
[ebuild  N     ] sci-libs/amd-2.4.6-r1::gentoo  USE="-doc -fortran" 336 KiB
[ebuild  N     ] sci-libs/colamd-2.9.6::gentoo  292 KiB
[ebuild  N     ] sci-libs/btf-1.2.6::gentoo  280 KiB
[ebuild  N     ] sci-libs/camd-2.4.6-r1::gentoo  USE="-doc" 310 KiB
[ebuild  N     ] sci-libs/ccolamd-2.9.6::gentoo  299 KiB
[ebuild  N     ] sci-libs/cxsparse-3.2.0::gentoo  2032 KiB
[ebuild  N     ] sci-libs/ldl-2.2.6::gentoo  USE="-doc -static-libs" 335 KiB
[ebuild  N     ] sci-libs/metis-5.2.1-r2::gentoo  USE="openmp -double-precision -examples -int64" 4725 KiB
[ebuild  N     ] sci-libs/openblas-0.3.34::gentoo  USE="openmp -cpudetection -index64 -pthread -relapack -test" 24734 KiB
[ebuild  N     ] sci-libs/klu-1.3.9-r2::gentoo  USE="-doc" 621 KiB
[ebuild  N     ] sci-libs/lapack-3.12.1-r2::gentoo  USE="deprecated flexiblas lapacke -doc -eselect-ldso -index64 -test" 7879 KiB
[ebuild  N     ] sci-libs/flexiblas-3.5.0::gentoo  USE="openblas openmp system-blas -blis -index64 -mkl -tbb -test" 80741 KiB
[ebuild  N     ] sci-libs/blas-lapack-aux-wrapper-6::gentoo  USE="-index64 -test" 10 KiB
[ebuild  N     ] virtual/lapack-3.10-r1::gentoo  USE="flexiblas -eselect-ldso -index64" 0 KiB
[ebuild  N     ] virtual/blas-3.8-r1::gentoo  USE="flexiblas -eselect-ldso -index64" 0 KiB
[ebuild  N     ] sci-libs/cholmod-3.0.13::gentoo  USE="lapack matrixops modify partition -cuda -doc" 680 KiB
[ebuild  N     ] sci-libs/spqr-2.0.9-r4::gentoo  USE="-doc -partition -tbb" 2111 KiB
[ebuild  N     ] sci-libs/umfpack-5.7.9-r1::gentoo  USE="cholmod -doc" 754 KiB
[ebuild  N     ] sci-libs/suitesparse-5.4.0::gentoo  USE="-cuda -doc -lapack -partition -tbb" 0 KiB

Total: 22 packages (22 new), Size of downloads: 126566 KiB