1)[4ab^2(a^2-4ab+4b^2)]/[2ab^2(a^3-8b^3)]=[4ab^2(a-2b)^2]/[2ab^2(a-2b)
2/(x-3)\cdot \left(x+1\right)+\frac{1}{1}-x^2=2/(x-3)
1)[4ab^2(a^2-4ab+4b^2)]/[2ab^2(a^3-8b^3)]=[4ab^2(a-2b)^2]/[2ab^2(a-2b)
2/(x-3)\cdot \left(x+1\right)+\frac{1}{1}-x^2=2/(x-3)