(2а-8b+3)*(-2)-5(-a+1,8-1,4)=-4а+16b-6+5a-9+7=a+16b-8
-5+16*1-8=-5+16-8=3
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(2а-8b+3)*(-2)-5(-a+1,8-1,4)=-4а+16b-6+5a-9+7=a+16b-8
-5+16*1-8=-5+16-8=3