“…Also, many modifications were made to this method by numerous researchers in an attempt to improve the accuracy or extend the applications of this method [1,2,6,11,19]. Also, El-Kalla polynomial was discussed by El-Kalla In [13,14,15,16,17,18], and conclude that El-kalla polynomial was directly used to estimate the maximum absolute truncated error of the Adomian series solution which cannot be estimated using the traditional polynomials.…”