$g\left(x\right)=\sqrt{x\:sin\left(x\right)}$

$\:\int\frac{2}{9+\left(x-1\right)^2}dx$

$\lim_{x\to+0}\left(x\cdot\log\left(x\right)\right)$

$\lim_{x\to1}\left(\frac{e^{x-1}-1}{\left(x-1\right)^2}\right)$

$\int\frac{\left(3x^2+2\right)}{x+1}dx$

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

$1+2-1-3$