$\frac{6x-18}{x^2-3x}$

$\lim_{x\to0}\frac{x^3+2x+3}{x}$

$\frac{1}{p\left(t\right)-p\left(t\right)^2}p'\left(t\right)=1$

$3xdx=ydy$

$\left(5-c\right)^2$

$\lim_{x\to\infty}\left(\frac{\left(6+10x^2\right)^{\frac{1}{2}}}{4+5x}\right)$

$12x^2-81=\left(11y+9\right)\left(11y-9\right)$