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{{1,2,3},{-1,1,3},{2,2,2},{3,1,-1}} * {{18/43+t-a}, {-3/86-2t-b}, {t-c}}={{-1},{0},{2},{1}}
{{1,2,3},{-1,1,3},{2,2,2},{3,1,-1}} * {{18/43+t-a}, {-3/86-2t-b}, {t-c}}={{-1},{0},{2},{1}}
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