$\frac{dy}{dx}+2xy=\left(4x-2\right)e^{-x^2}$

$2x^2+3x-10=0$

$\left(a^2+3\right)\left(a^2-5\right)$

$\lim_{x\to1}\left(\frac{t^2-1}{sin\left(t-1\right)}\right)$

$\:\frac{x^3}{2^{n+1}}$

$\frac{d}{dx}\sqrt{\frac{x+5}{x+2}}$

$\lim_{t\to0}\left(-\frac{2\left(\left(t^2-2t+2\right)\:e^t-e^4\:t\right)}{\left(15t^3\:\right)}\right)$