$\frac{x}{5}-7\le-9$

$\frac{d}{dx}\left(\frac{\left(x^8\left(x-5\right)^4\right)}{\left(x^2+9\right)^3}\right)$

$\left(x^2-\frac{1}{2}y\right)\left(\frac{1}{3}x^3-2y\right)\left(-\frac{5}{2}x-\frac{1}{3}y\right)$

$\int\frac{3-x}{\sqrt{16+6x-x^2}}dx$

$\left(5+b\right)^2$

$\left(x^2-1\right)y^3dx+x^2dy$