$\left(n^3m^{-1}x\right)^{-4}$

$\frac{30a^{11}b^9}{10a^2b^4}$

$\left(\frac{1}{3}x^3-3x^2-8x-9\right)\cdot\left(\frac{1}{2}x-\frac{225}{4}\right)$

$\int\left(\frac{\tan\left(ax\right)}{\cos\left(ax\right)}\right)dx$

$\frac{d}{dx}7$

$\lim_{x\to\infty}\left(\frac{\sqrt{1-x^2}}{36x^2-1}\right)$

$500b-6b+14b-6b-\left(7b-2b\right)+\left(4b-b\right)$