$\int\frac{x^3}{\sqrt[2]{x^2-9}}dx$

$\frac{d}{dx}\left(\sin\left(x+y\right)^2=y\right)$

$x^2-2x+1+y^2-6y+9$

$\int\left(\frac{-1}{x}\right)dx$

$2x^2-7x+4=0$

$\lim_{x\to\infty}\left(\left(1-\frac{3}{x}\right)^{0.5x}\right)$

$5-6-420-11$