$\left(\frac{3^{-4}\cdot5^{-1}}{3^2\cdot5^{-3}}\right)\left(\frac{3^4\cdot5^3}{3^2\cdot5^4}\right)$

$\lim\:_{x\to\:2}\frac{\left(x^3-5x^2+8x-4\right)}{\left(2x^3-6x^2+8\right)}$

$\int_{-1}^15x\:dx$

$4\left(-x+2\right)-1\le-3\left(x+5\right)$

$14-80\left(\infty\right)^3$

$16x^4-24x^2b+9b^2$

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