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?

thanks