$\displaystyle \frac{(2ab)^-2}{2(ab)^3}$
Can this fraction be simlified ?
I expanded it out to:
$\displaystyle \frac{2a^-2 + b^-2}{2a^3 + 2b^3}$
Even in this form I can't see common factors in the numerator so does that mean this cant be simplified ?