2026-07-072026-07-07http://salesiana.dossiersoluciones.com/handle/123456789/65525Is is shown that all but O(x^{23207/23240}) even integers N<x can be written as the sum of a square, a cube, a forth and a fifth power of a prime.Number Theory11P32, 11L07A remark on a theorem of the Goldbach Waring typetext