  The aim of this paper is to explore the complexity factor (CF) for those
self-gravitating relativistic spheres whose evolution proceeds non-dynamically.
We are adopting the definition of CF mentioned in \cite{PhysRevD.97.044010},
modifying it to the static spherically symmetric case, within the framework of
a modified gravity theory (the Palatini $f(R)$ theory). In this respect, we
have considered radial dependent anisotropic matter content coupled with
spherical geometry and determined the complexity factor involved in the
patterns of radial evolution. We shall explore the field and a well-known
Tolman-Oppenheimer-Volkoff equations. After introducing structure scalars from
the orthogonal decomposition of the Riemann tensor, we shall calculate
complexity factor. An exact analytical model is presented by considering
firstly ansatz provided by Gokhroo and Mehra. The role of matter variables and
$f(R)$ terms are analyzed in the structure formation as well as their evolution
through a complexity factor.

General Relativity and Quantum Cosmology