Due to their capacity to simulate intricate dynamic systems containing memory effects and non-local interactions, fractional differential equations have attracted a great deal of attention lately. This study examines
multi-term fractional differential equations with variable type delay with the goal of illuminating their complex dynamics and analytical characteristics. The introduction to fractional calculus and the justification
for its use in many scientific and technical domains sets the stage for the remainder of the essay. It describes
the importance of including variable type delay in differential equations and then applying it to model more
sophisticated and realistic behaviours of real-world phenomena. The research study then presents the mathematical formulation of variable type delay and multi-term fractional differential equations. The system’s
novelty stems from its unique combination of variable delay, generalized multi terms fractional differential
operators (n and m), and integral implicit parameters, and studying the stability of the the newly formulated
system as compared to the work in the existing literature. While the variable type delay is introduced as a
function of time to describe instances where the delay is not constant, the fractional order derivatives are
generated using the Caputo approach. The existence, uniqueness, and stability of solutions are the main
topics of the theoretical analysis of the suggested differential equations. In order to establish important
mathematical features, the inquiry makes use of spectral techniques, and fixed-point theorems. The study
finishes by summarizing the major discoveries and outlining potential future research avenues in this developing field. It highlights the potential contribution of multi-term fractional differential equations with
variable type delay to improving the control and design of complex systems. Overall, this study adds to the
growing body of knowledge in the field of fractional calculus and provides insightful information about the
investigation of multi-term fractional differential equations.