Gunakan metode pecahan parsial untuk menen- tukan integral-integral berikut

(a) $\int \frac {x^{3}}{x-5}dx$

(d $\int \frac {1}{x(x^{2}+4)}dx$

(b) $\int \frac {2x-1}{x^{2}-5x+6}dx$

(e) $\int \frac {x^{2}+3}{(x^{2}+2x+3)^{2}}dx$

(c) $\int \frac {3}{(x+1)(x^{2}+x)}dx$