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

$21\:-\:\left(14a\:+\:13\right)\:+\:\left(6a\:+3\:5\right)\:-\:\left(17\:-\:23a\right)$

$x^x+2^x-ln\left(sqrt\left(e^{\left(2x\right)}+2e^x+e^{\left(sqrt\left(x\right)\right)}\right)\right)$

$x^2+2x^2y+3xy=0$

$10\:+\:3y\:-\:4\:+\:8y$

$\frac{d}{dx}\left(\frac{1}{\left(x^3-x+1\right)^2}\right)^4$