$\lim_{x\to0}\left(\frac{xe^x-1}{\sin^2\left(x\right)}\right)$

$\frac{2\left(x^2+x+1\right)}{\left(x-1\right)\left(x+1\right)}$

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

$2\int_0^5\left(\left(x\right)\left(5e^x-5e^{-x}\right)\right)dx$

$9^2+\left(3+2\right)+\left(5+9\right)+3^2$

$\frac{2x^4+3x^3-x-3}{x+2}$

$-2\:x-5\:+3\:x\:-5-5$