52X47+55x52-104
=52x47+52x55-52x2
=52x(47+55-2)
=52x100
=5200
52×47+55×52-104
=52(47+55)-104)
=52×102-104
=52(100+2)-104
=5200+104-104
=5200
52×47+55×52-104
=52×47×55×52-52×2
=52×(47+55-2)
=52×100
=5200
52*47+55*52-104
=52*47+55*52-52*2
=52*(47+55-2)
=52*100
=5200