19+56+11= (19+11)+56 = 30+56=86
456+22+78= (22+78)+456=100+456=556
134+408+166= (134+166)+408=300+408=708
42+(58+495) = 42+58+495 = (42+58)+495 = 100+495=595
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19+56+11= (19+11)+56 = 30+56=86
456+22+78= (22+78)+456=100+456=556
134+408+166= (134+166)+408=300+408=708
42+(58+495) = 42+58+495 = (42+58)+495 = 100+495=595