$e^ne^x$

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

$\lim_{x\to0}\left(\ln\left(x\right)\cdot\left(2x-\sin\left(x\right)\right)\right)$

$\left(\frac{1}{7}y^{2i+1}-\frac{1}{4}y^{i+2}\right)^2$

$\int x\:\left(\sqrt{x}2+7\right)dx$

$2\sin\left(\frac{1}{2}x\right)+\sqrt{3}=0$

$\left(x^4+3x^3-x^2-2x+1\right)\left(x+1\right)$