Implement exp, log, power and ** in ruby #498

Job	Run time
ruby-versions / Generate Ruby versions	2s
ubuntu-latest 2.5	54s
ubuntu-latest 2.6	57s
ubuntu-latest 2.7	1m 2s
ubuntu-latest 3.0	34s
ubuntu-latest 3.1	35s
ubuntu-latest 3.2	43s
ubuntu-latest 3.3	41s
ubuntu-latest 3.4	36s
ubuntu-latest debug	31s
ubuntu-latest head	35s
ubuntu-latest truffleruby	52s
ubuntu-latest truffleruby-head	1m 19s
macos-latest 2.6	55s
macos-latest 2.7	56s
macos-latest 3.0	22s
macos-latest 3.1	37s
macos-latest 3.2	6h 0m 14s
macos-latest 3.3	6h 0m 14s
macos-latest 3.4	19s
macos-latest debug	20s
macos-latest head	20s
macos-latest truffleruby	31s
macos-latest truffleruby-head	45s
macos-14 2.6	39s
macos-14 2.7	40s
macos-14 3.0	20s
macos-14 3.1	25s
macos-14 3.2	6h 0m 14s
macos-14 3.3	19s
macos-14 3.4	20s
macos-14 debug	22s
macos-14 head	18s
macos-14 truffleruby	28s
macos-14 truffleruby-head	39s
windows-latest 2.5	3m 28s
windows-latest 2.6	3m 46s
windows-latest 2.7	5m 52s
windows-latest 3.0	2m 53s
windows-latest 3.1	3m 8s
windows-latest 3.2	2m 57s
windows-latest 3.3	2m 57s
windows-latest 3.4	3m 11s
windows-latest head	2m 56s
windows-latest mingw	2m 42s
windows-latest mswin	2m 39s
	18h 56m 7s

Provide feedback