Math $102$

$3$: Find the following integrals

a$){\displaystyle \underset{\phantom{}}{\overset{\phantom{}}{}}}xcos{h}^{2}xdx$

d$){\displaystyle \underset{\phantom{}}{\overset{\phantom{}}{}}}co{t}^{-1}xdx$

b$){\displaystyle \underset{\phantom{}}{\overset{\phantom{}}{}}}\frac{dx}{(x+1)(x+2)(x-3)}$

e$){\displaystyle \underset{\phantom{}}{\overset{\phantom{}}{}}}\sqrt[\phantom{2}]{9-x^2}dx$

c$){\displaystyle \underset{\phantom{}}{\overset{\phantom{}}{}}}se{c}^{2}xta{n}^{9}xdx$

f$){\displaystyle \underset{\phantom{}}{\overset{\phantom{}}{}}}cos6xcos5xdx$