Exact solutions of triple-order time-fractional differential equations for anomalous relaxation and diffusion I: The accelerating case

► Exact solution triple-order time-fractional anomalous relaxation. ► Exact solution triple-order time-fractional anomalous diffusion. ► New method to solve multi-order time-fractional differential equations. ► Prabhakar generalized Mittag-Leffler function.