$4\frac{d^4y}{dx^4}+\left(-24\frac{d^3y}{dx^3}\right)+\left(-1547\frac{d^2y}{dx^2}\right)+\left(-3496\frac{dy}{dx}\right)+\left(-20352y\right)=0$

$\int x\arctan\left(\frac{x}{4}\right)dx$

$f\left(x\right)=x^{3}-10x^{2}+25x$

$y^'-4y=20$

$6t^2+6t^3+2t^3$

$\frac{dy}{dx}\left(xe^{tanx}\right)$

$\lim_{x\to2}\left(\frac{x^2-4}{x-3}\right)$