Table 2.

Presents a numerical comparison of Eqs. (1) and (26).

t	NS of the nonlinear Eq. (1)	NS of the advanced NPA Eq. 26	Absolute error	Relative absolute error	Relative absolute error (%)
0	0.2	0.2	0	0	0
5	− 0.0971513	− 0.0929275	0.00422382	0.0434768	4.34768
10	0.0414185	0.0356473	0.00577126	0.13934	13.934
15	− 0.0195691	− 0.0164479	0.00312118	0.159496	15.9496
20	− 0.00169614	− 0.00156325	0.000132892	0.0783498	7.83498
25	0.00936973	0.00718634	0.00218339	0.233026	23.3026
30	− 0.00104883	0.00175433	0.00280316	2.67265	267.265
35	0.00535094	0.00284964	0.00250131	0.467452	46.7452
40	− 0.00767451	− 0.00584803	0.00182648	0.237993	23.7993
45	− 0.00279337	− 0.00390287	0.00110949	0.397187	39.7187
50	− 0.000428967	0.000123265	0.000552232	1.28735	128.735