$x\sqrt{x^2}+1$

$2.5+7.5-9.26$

$\lim_{x\to1}\left(\frac{\ln\left(1+x^2\right)}{\cos\left(3x\right)-e^{-x}}\right)$

$\left(\:3m^3\:-\:8n^2\:\right)\left(\:9m^6\:+\:24m^3n^2\:+\:64n^4\right)$

$m^8+18m^4+81$

$x^2-65x$

$\frac{dy}{dx}-\tan\left(x\right)y\:=\sin\left(x\right)\cos\left(x\right)$