Răspuns:
={2x25-[49-(324:12-6561:729):2]:4}:8=
={50-[49-(27-9):2]:4}:8=
={50-[49-18:2]:4}:8=
={50-[49-9]:4}:8=
={50-40:4}:8=
={50-10}:8=
=40:8=
=5