$2x^2+10x=9$

$\int\frac{x^3+3x^2}{x^2+1}dx$

$\left(x^2+1\right)\frac{dy}{dx}+xy=\left(1-2x\right)\left(\sqrt{x^2+1}\right)$

$\lim_{x\to-2}\left(\frac{x^3+1}{x+2}\right)$

$\left(-159\right)-\left(-345\right)$

$\int_1^{\infty}\left(\frac{8}{x^2+1}\right)dx$

$\log_x\left(x^x\right)$