Use partial fractions to evaluate the following integrals.

A$.{\displaystyle \underset{\phantom{}}{\overset{\phantom{}}{}}}\frac{dx}{x^2-7x+12}$

E$.{\displaystyle \underset{\phantom{}}{\overset{\phantom{}}{}}}\frac{8dx}{x(x+2{)}^3}$

B$.{\displaystyle \underset{\phantom{}}{\overset{\phantom{}}{}}}\frac{x^2-x+1}{x^2+x}dx$

F$.{\displaystyle \underset{\phantom{}}{\overset{\phantom{}}{}}}\frac{x+8}{x(x^2+4)}dx$

C$.{\displaystyle \underset{\phantom{}}{\overset{\phantom{}}{}}}\frac{dx}{x^3-4x}$

G$.{\displaystyle \underset{\phantom{}}{\overset{\phantom{}}{}}}\frac{4x^2}{x^3-x^2+x-1}dx$

D$.{\displaystyle \underset{\phantom{}}{\overset{\phantom{}}{}}}\frac{dx}{x^2(x+1)(x-2)}$