$\sqrt[3]{z^{4}z^{-\frac{3}{2}}}$

$\left(-8\right)\left(-5\right)+\left(4\right)\left(-3\right)$

$\int9\left(\tan\left(x\right)\left(\ln\left(\cos\left(x\right)\right)\right)\right)dx$

$\lim_{x\to infinity}\frac{cos\left(x\right)-1+\frac{1}{2}x^2}{x^4}$

$\frac{\left(-5x^2-10x-5\right)}{\left(x^2-1\right)^2}$

$9x^2+30x+225$

$\frac{3^{n+2}-2^{n+3}}{4^{n+1}}$