“…Still, it is impossible to find exact results when dealing with linear equations. Many useful methods have been applied to investigate nonlinear fractional partial differential equations, for example, analytical solutions with the help of natural decomposition method of fractional-order heat and wave equations [9], fractional-order partial differential equations with proportional delay [10], fractional-order hyperbolic telegraph equation [11] and fractional-order diffusion equations [12], the variational iterative transform method [13], the homotopy perturbation transform method [14,15], the homotopy analysis transform method [16,17], reduced differential transform method [18,19], qhomotopy analysis transform method [20][21][22][23][24], the finite element technique [25], the finite difference technique [26], and so on [27][28][29][30].…”