$\frac{dy}{dx}=\frac{-x-y}{x-y}$

$\left[cosec\:\theta\:\:+\:\left(sec\theta\:\right)^{\left(\left[2\:\right]\:\right)}\right]\:=\:\left[\left(cosec\:\theta\:\right)^{\left(2\right)}\:+\:sec\theta\:\right]$

$\lim_{x\to25}\left(\frac{x-25}{\sqrt{x-5}}\right)$

$\frac{9a^2}{25}\:-\:\frac{49b^2}{36}$

$\int a^2\sqrt{a^2+3}da$

$\frac{dy}{dx}+2y=y^2e^x$

$\int16x^3\sqrt[3]{4x^4-4}dx$