$\frac{5x^2y^{-3}}{15x^5}$

$\lim_{x\to\infty}\left(a\cdot\frac{\left(.5m\right)\left(v-u\right)^2}{x\cdot t}\right)^{\left(-x-1\right)}$

$\left(4x+10\right)\left(16x^2+40x+100\right)$

$\lim_{x\to0}\left(\frac{tan\cdot x-x}{x^3}\right)$

$\lim\:_{x\to\:\:0}\left(\frac{e^{x^2}-x^2-1}{\log\:_e\left(1+x^2\right)-x^2}\right)$

$\left(x^4-12y\right)\left(x^4-6y\right)$

$\int\sec^25x\sqrt{\tan^25x-4}dx$