6x^-12 - 6y^3 ... I think
GCF = -c^2d^3
Factors are -c^2d^3(8c^3d^3 + 27c^2d + 24)
Well it depends on the function
A unit fraction is a fraction where the denominator is one, so the easiest way to write 4/5 as a sum of unit fractions is to use 1/5. So the answer would be 1/5+1/5+1/5+1/5. Add up all the numerators and put that over their like denominators to get 4/5!