$\sqrt[5]{x^4\sqrt{x^{-1}\sqrt{x^{-2}}}}$

$\frac{du}{dt}=\frac{8+t^4}{ut^2+u^4t^2}$

$\frac{t}{-5}+25=-15$

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

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

$\lim_{x\to1}\left(\frac{x^2-2x+1}{cos\left(x-1\right)-1}\right)$

$2x-1\ge-x-3$