12×142+14×162+16×182+18×202+201
=(12+14+16+18)×(142+162+182+202)+201
=60×(71+81+91+101)+201
=60×50402414+201
=842414+201
=1206041
12×142+14×162+16×182+18×202+201
=(12+14+16+18)×(142+162+182+202)+201
=60×(71+81+91+101)+201
=60×50402414+201
=842414+201
=1206041