2026-07-072026-07-07http://salesiana.dossiersoluciones.com/handle/123456789/7868We review the Palatini formulation of the higher-derivative gravity of the $L(R)$ form and its applications in cosmology.4 pages, no figures. To appear in QG issue of TSPU Vestnik edited by Sergei D. OdintsovAstrophysicstext