import Mathlib.Tactic
/-!
# USA Mathematical Olympiad 2005, Problem 2
Prove that there do not exist integers x,y,z such that
x⁶ + x³ + x³y + y = 147¹⁵⁷
x³ + x³y + y² + y + z⁹ = 157¹⁴⁷.
-/
namespace Usa2005P2
theorem usa2005_p2 :
¬∃ (x y z : ℤ),
x^6 + x^3 + x^3 * y + y = 147^157 ∧
x^3 + x^3 * y + y^2 + y + z^9 = 157^147 := sorry
end Usa2005P2
This problem has a complete formalized solution.