lean_workbook_plus_11526

import Mathlib.Analysis.Complex.Basic

theorem lean_workbook_plus_11526 (a b c : ℝ) : (a^2 + b^2 + a * b) * (b^2 + c^2 + b * c) * (c^2 + a^2 + c * a) ≥ 3 * (a * b^2 + b * c^2 + c * a^2) * (a^2 * b + b^2 * c + c^2 * a)   :=  by sorry