1) (23+77)+89=189
2) (44+56)+78=178
3) (223+277)+289=789
4) (144+256)+578=978
5) (123+177)+289=589
6) (544+156)+278=978
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1) (23+77)+89=189
2) (44+56)+78=178
3) (223+277)+289=789
4) (144+256)+578=978
5) (123+177)+289=589
6) (544+156)+278=978