Confirmation of accelerated expansion of the universe probed the concept of
dark energy theory, and since then, numerous models have been introduced to
explain its origin and nature. The present work is based on reconstructing dark
energy by parametrization of the deceleration parameter in the FRW universe
filled with radiation, dark matter, and dark energy. We have chosen some
well-motivated parametrized models 1-3 in an attempt to investigate the energy
density in terms of deceleration parameters by estimating the cosmological
parameters with the help of different observational datasets. Also, we have
introduced a new model 4 for the parametrization of the deceleration parameter.
Then we analyzed the cosmography parameters using the best-fit values of the
parameters. Using the information criteria, we have examined the viability of
the models