expm1(0) = 0
expm1(-0) = 0
expm1(1e-19) = 1.00000000000000000005e-19
expm1(-1e-19) = -9.9999999999999999995e-20
expm1(1e-5) = 1.0000050000166667083334166668055558e-05
expm1(-1e-5) = -9.999950000166666250000833331944446e-06
expm1(1) = 1.718281828459045235360287471352662
expm1(-1) = -0.6321205588285576784044762298385391
expm1(1e5) = +Inf
expm1(-1e5) = -1
expm1(1e19) = +Inf
expm1(-1e19) = -1
expm1(2e-19) = 2.0000000000000000002e-19
expm1(-2e-19) = -1.9999999999999999998e-19
expm1(2e-5) = 2.000020000133334000002666675555581e-05
expm1(-2e-5) = -1.99998000013333266666933332444447e-05
expm1(2) = 6.389056098930650227230427460575008
expm1(-2) = -0.8646647167633873081060005050275156
expm1(2e5) = +Inf
expm1(-2e5) = -1
expm1(2e19) = +Inf
expm1(-2e19) = -1
expm1(3e-19) = 3.00000000000000000045e-19
expm1(-3e-19) = -2.99999999999999999955e-19
expm1(3e-5) = 3.000045000450003375020250101250434e-05
expm1(-3e-5) = -2.999955000449996625020249898750434e-05
expm1(3) = 19.08553692318766774092852965458172
expm1(-3) = -0.9502129316321360570206575843499382
expm1(3e5) = +Inf
expm1(-3e5) = -1
expm1(3e19) = +Inf
expm1(-3e19) = -1
expm1(4e-19) = 4.0000000000000000008e-19
expm1(-4e-19) = -3.9999999999999999992e-19
expm1(4e-5) = 4.000080001066677333418667235558806e-05
expm1(-4e-5) = -3.999920001066656000085332764447695e-05
expm1(4) = 53.59815003314423907811026120286088
expm1(-4) = -0.9816843611112658197062819787267588
expm1(4e5) = +Inf
expm1(-4e5) = -1
expm1(4e19) = +Inf
expm1(-4e19) = -1
expm1(5e-19) = 5.00000000000000000125e-19
expm1(-5e-19) = -4.99999999999999999875e-19
expm1(5e-5) = 5.000125002083359375260418836821057e-05
expm1(-5e-5) = -4.999875002083307291927081163209945e-05
expm1(5) = 147.4131591025766034211155800405523
expm1(-5) = -0.9932620530009145329033639515768516
expm1(5e5) = +Inf
expm1(-5e5) = -1
expm1(5e19) = +Inf
expm1(-5e19) = -1
expm1(6e-19) = 6.0000000000000000018e-19
expm1(-6e-19) = -5.9999999999999999982e-19
expm1(6e-5) = 6.000180003600054000648006480055543e-05
expm1(-6e-5) = -5.999820003599946000647993520055542e-05
expm1(6) = 402.4287934927351226083871805433883
expm1(-6) = -0.9975212478233336415769548325691833
expm1(6e5) = +Inf
expm1(-6e5) = -1
expm1(6e19) = +Inf
expm1(-6e19) = -1
expm1(7e-19) = 7.00000000000000000245e-19
expm1(-7e-19) = -6.99999999999999999755e-19
expm1(7e-5) = 7.000245005716766709733933006968958e-05
expm1(-7e-5) = -6.999755005716566626400566993357844e-05
expm1(7) = 1095.6331584284585992637202382881214
expm1(-7) = -0.9990881180344454837919968639155907
expm1(7e5) = +Inf
expm1(-7e5) = -1
expm1(7e19) = +Inf
expm1(-7e19) = -1
expm1(8e-19) = 8.0000000000000000032e-19
expm1(-8e-19) = -7.9999999999999999968e-19
expm1(8e-5) = 8.000320008533504002730703075971661e-05
expm1(-8e-5) = -7.999680008533162669397296924860542e-05
expm1(8) = 2979.957987041728274743592099452889
expm1(-8) = -0.9996645373720974881611786108742191
expm1(8e5) = +Inf
expm1(-8e5) = -1
expm1(8e19) = +Inf
expm1(-8e19) = -1
expm1(9e-19) = 9.00000000000000000405e-19
expm1(-9e-19) = -8.99999999999999999595e-19
expm1(9e-5) = 9.000405012150273379920823812199012e-05
expm1(-9e-5) = -8.999595012149726629920676189698991e-05
expm1(9) = 8102.08392757538400770999668943276
expm1(-9) = -0.99987659019591332045050236330927
expm1(9e5) = +Inf
expm1(-9e5) = -1
expm1(9e19) = +Inf
expm1(-9e19) = -1
