isabelle/valid/aime_1990_p2.thy (11 lines of code) (raw):

(* Authors: Albert Qiaochu Jiang *) theory aime_1990_p2 imports Complex_Main "HOL-Computational_Algebra.Computational_Algebra" begin theorem aime_1990_p2: "((52::real) + 6 * sqrt 43) powr (3/2) - ((52::real) - 6 * sqrt 43) powr (3/2) = 828" sorry end