“…In some schemes, by combining the HAM by other methods or operators we can construct new methods such as combining the HAM and Laplace transformations (HATM) [11,29,39,45], optimal homotopy analysis method [38], discrete homotopy analysis method [7,58], predictor homotopy analysis method [1,51,52], homotopy analysis Sumudu transform method [28,54] and many others [2,9,48,50].…”