Ok, I'm going to post 3 so I can be sure of how to do each kind.

$\displaystyle

\frac {6}{x^2-9x+20} * (5x-25)

$

$\displaystyle

\frac {2x-6}{x^2+5x-24} * \frac {x^2+6x-16}{3x}

$

$\displaystyle

\frac {(\frac {3x^2}{8x^5} * 2x^3)}{\frac {9x}{8x^2}}

$