“…There has been many research on multistep methods done for Eq. 1, particularly the two-step hybrid method (HM) (Tsitouras, 2003;Coleman, 2003;Franco, 2006;Fang and Wu, 2008;Samat et al, 2012;Ahmat et al, 2013;Jikantora et al, 2015;Franco et al, 2014;Franco and Randez, 2016;Kalogiratou et al, 2016). In a previous work, Coleman (2003), he has investigated the order condition of two-step hybrid method based on the theory of B-series.…”