GON(((28 26,28 0,84 0,84 42,28 26),(52
18,66 23,73 9,48 6,52 18)),
  ((59 18,67 18,67 13,59 13,59 18)))')),
  (MPolyFromText('MULTIPOLYGON(((28 26,28 0,84 0,84 42,28 26),(52 18,66
23,73 9,48 6,52 18)),
    ((59 18,67 18,67 13,59 13,59 18)))')),
  (MPolyFromWKB(AsWKB(MultiPolygon(Polygon(LineString(
   Point(0, 3), Point(3, 3), Point(3, 0), Point(0, 3)))))));

URL: https://mariadb.com/kb/en/multipolygon/https://mariadb.com/kb/en/multipolygon/