express the determinant
l a1+b1 c1+d1 e1+f1 l
l a2+b2 c2+d2 e2+f2 l
l a3+b3 c3+d3 e3+f3 l
as a sum of 8 determinants whose entries contain no sums..
i know how to find the determinant of this matrix but what does it mean to express it as a sum of 8 determinants?