$\frac{2n^2}{\left(n^2\right)^{-2}}$

$\int\frac{2}{\left(x^2+4\right)\left(x^2+1\right)}dx$

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

$\left(\frac{1}{2}c^3d\right)^5$

$\frac{d}{dx}\left(\frac{\left(x^2\left(x-5\right)^5\right)}{\left(x-4\right)^3}\right)$

$\lim_{x\to\infty}\left(\frac{3x+1}{2-\sqrt{x^2-4}}\right)$

$\left(5x+5\right)^2-\left(5x-5\right)^2$