$\frac{dy}{dx}=\frac{y^3}{\left(11-10x-x^2\right)^2}$

$2\sec\left(x\right)^2-1$

$cos\left(x\right)=-\frac{\sqrt[2]{15}}{5}$

$\lim_{x\to\infty}\left(\frac{2x+3x^2}{1-x^4}\right)$

$\frac{dy}{dx}+\frac{y}{x}=7x^3$

$\frac{yz^4-5xy^2z^7}{yz}$

$\left(7x^5y^4\right)\left(-3x^2y\right)$