Please let me know if I am clogging up your board...I just have a few equations that I really need to see how theyre done..thanks!
$\displaystyle \frac{1-\frac{r}{2r+1}}{r-\frac{1}{2r+1}}$
$\displaystyle \frac{\frac{2r+1}{2r+1}-\frac{r}{2r+1}}{\frac{r(2r+1)}{2r+1}-\frac{1}{2r+1}}$
$\displaystyle \frac{\frac{r+1}{2r+1}}{\frac{2r^2+r-1}{2r+1}}$
$\displaystyle \frac{r+1}{2r^2+r-1}$
$\displaystyle \frac{r+1}{(r+1)(2r-1)}$
$\displaystyle \frac{1}{2r-1}$