$\lim_{x\to0}\left(\frac{\left(e^x-1\right)}{\log_e\left(x\right)}\right)$

$2x^2-3xy-3y+2x$

$\left(6x+9y\right)\left(6x-9y\right)$

$\frac{x^2-9y^2}{3x+9y}$

$\int\frac{2x-3}{x^2+2x+10}dx$

$\lim_{x\to0}\left(\frac{\sqrt{5y+4}-2}{y}\right)$

$\int\frac{\left(x^2-2x+4\right)}{\left(x+2\right)\left(x-3\right)}dx$