Fix: rework nondet math operations

[amimart]

Purpose of Changes and their Description

Benchmarks before re-implementation:

BenchmarkLn
BenchmarkLn/input_1.2
BenchmarkLn/input_1.2-12                                                                                	   12574	     95334 ns/op
BenchmarkLn/input_1024
BenchmarkLn/input_1024-12                                                                               	   16348	    108261 ns/op
BenchmarkLn/input_36028797018963968
BenchmarkLn/input_36028797018963968-12                                                                  	   15177	     75549 ns/op
BenchmarkLn/input_999999999999999999999999999999999999999999999999999999.9122181273612911
BenchmarkLn/input_999999999999999999999999999999999999999999999999999999.9122181273612911-12            	   10000	    111765 ns/op
BenchmarkLn/input_0.5632892391219024912482190471290471
BenchmarkLn/input_0.5632892391219024912482190471290471-12                                               	   10000	    104735 ns/op
BenchmarkLn/input_0.0000000000000024912482190471290471
BenchmarkLn/input_0.0000000000000024912482190471290471-12                                               	   12079	     96838 ns/op
BenchmarkLog10
BenchmarkLog10/input_1.2
BenchmarkLog10/input_1.2-12                                                                             	   17979	     66241 ns/op
BenchmarkLog10/input_1024
BenchmarkLog10/input_1024-12                                                                            	   18159	     68151 ns/op
BenchmarkLog10/input_36028797018963968
BenchmarkLog10/input_36028797018963968-12                                                               	   17491	     65390 ns/op
BenchmarkLog10/input_999999999999999999999999999999999999999999999999999999.9122181273612911
BenchmarkLog10/input_999999999999999999999999999999999999999999999999999999.9122181273612911-12         	  164803	      7181 ns/op
BenchmarkLog10/input_0.5632892391219024912482190471290471
BenchmarkLog10/input_0.5632892391219024912482190471290471-12                                            	   17254	     69098 ns/op
BenchmarkLog10/input_0.0000000000000024912482190471290471
BenchmarkLog10/input_0.0000000000000024912482190471290471-12                                            	   18475	     64864 ns/op
BenchmarkExp
BenchmarkExp/input_1.2
BenchmarkExp/input_1.2-12                                                                               	   44658	     26917 ns/op
BenchmarkExp/input_1024
BenchmarkExp/input_1024-12                                                                              	   28041	     42834 ns/op
BenchmarkExp/input_0.5632892391219024912482190471290471
BenchmarkExp/input_0.5632892391219024912482190471290471-12                                              	   38924	     31125 ns/op
BenchmarkExp/input_0.0000000000000024912482190471290471
BenchmarkExp/input_0.0000000000000024912482190471290471-12                                              	  208060	      5973 ns/op
BenchmarkExp10
BenchmarkExp10/input_1.2
BenchmarkExp10/input_1.2-12                                                                             	    9841	    122567 ns/op
BenchmarkExp10/input_1024
BenchmarkExp10/input_1024-12                                                                            	  331681	      3487 ns/op
BenchmarkExp10/input_0.5632892391219024912482190471290471
BenchmarkExp10/input_0.5632892391219024912482190471290471-12                                            	   10000	    114478 ns/op
BenchmarkExp10/input_0.0000000000000024912482190471290471
BenchmarkExp10/input_0.0000000000000024912482190471290471-12                                            	   13747	     86255 ns/op
BenchmarkPow
BenchmarkPow/input_1.2_1.2
BenchmarkPow/input_1.2_1.2-12                                                                           	   10000	    103102 ns/op
BenchmarkPow/input_1.2_1024
BenchmarkPow/input_1.2_1024-12                                                                          	  271375	      4306 ns/op
BenchmarkPow/input_1.2_0.5632892391219024912482190471290471
BenchmarkPow/input_1.2_0.5632892391219024912482190471290471-12                                          	   10000	    108747 ns/op
BenchmarkPow/input_1.2_0.0000000000000024912482190471290471
BenchmarkPow/input_1.2_0.0000000000000024912482190471290471-12                                          	   14313	     84533 ns/op
BenchmarkPow/input_1024_1.2
BenchmarkPow/input_1024_1.2-12                                                                          	   10000	    115053 ns/op
BenchmarkPow/input_1024_1024
BenchmarkPow/input_1024_1024-12                                                                         	  205261	      5301 ns/op
BenchmarkPow/input_1024_0.5632892391219024912482190471290471
BenchmarkPow/input_1024_0.5632892391219024912482190471290471-12                                         	    9950	    117483 ns/op
BenchmarkPow/input_1024_0.0000000000000024912482190471290471
BenchmarkPow/input_1024_0.0000000000000024912482190471290471-12                                         	   13574	     84458 ns/op
BenchmarkPow/input_0.5632892391219024912482190471290471_1.2
BenchmarkPow/input_0.5632892391219024912482190471290471_1.2-12                                          	   10000	    114668 ns/op
BenchmarkPow/input_0.5632892391219024912482190471290471_1024
BenchmarkPow/input_0.5632892391219024912482190471290471_1024-12                                         	  175396	      6831 ns/op
BenchmarkPow/input_0.5632892391219024912482190471290471_0.5632892391219024912482190471290471
BenchmarkPow/input_0.5632892391219024912482190471290471_0.5632892391219024912482190471290471-12         	    9762	    120427 ns/op
BenchmarkPow/input_0.5632892391219024912482190471290471_0.0000000000000024912482190471290471
BenchmarkPow/input_0.5632892391219024912482190471290471_0.0000000000000024912482190471290471-12         	   13046	     93029 ns/op
BenchmarkPow/input_0.0000000000000024912482190471290471_1.2
BenchmarkPow/input_0.0000000000000024912482190471290471_1.2-12                                          	    9841	    118837 ns/op
BenchmarkPow/input_0.0000000000000024912482190471290471_1024
BenchmarkPow/input_0.0000000000000024912482190471290471_1024-12                                         	  181774	      6511 ns/op
BenchmarkPow/input_0.0000000000000024912482190471290471_0.5632892391219024912482190471290471
BenchmarkPow/input_0.0000000000000024912482190471290471_0.5632892391219024912482190471290471-12         	   10000	    112465 ns/op
BenchmarkPow/input_0.0000000000000024912482190471290471_0.0000000000000024912482190471290471
BenchmarkPow/input_0.0000000000000024912482190471290471_0.0000000000000024912482190471290471-12         	   14572	     82107 ns/op

Are these changes tested and documented?

• If tested, please describe how. If not, why tests are not needed.
• If documented, please describe where. If not, describe why docs are not needed.
• Added to Unreleased section of CHANGELOG.md?