$-3d\:-\:2d\:+\:7d\:-\:5d$

$\frac{dy}{dx}=\frac{2x+xy^{2}}{4y+yx^{2}}$

$\lim_{x\to0}\left(\frac{sin\left(5x\right)}{1-cos\left(3x\right)}\right)$

$\frac{1}{\left(x^2\left(\sqrt{x^2-4}\right)\right)}$

$4n^8-324n^2$

$\left(4x^2y\:-\:2z^2\right)^2$

$\int\left(\frac{\left(7x\right)}{\left(7x^2+4\right)}\right)dx$