−(6,77−689)−(0,23−219)=901
6,77-689=-682,23
0,23-219=-218,77
-(-682,23)-(-218,77)=682,23+218,77=901
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−(6,77−689)−(0,23−219)=901
6,77-689=-682,23
0,23-219=-218,77
-(-682,23)-(-218,77)=682,23+218,77=901