$\frac{3x}{\:5}-\frac{7}{10}-\frac{x}{20}>\frac{1}{5}+\frac{7x}{20}$

$\frac{24r^4-16r^3+8r}{4r}$

$\lim_{x\to0}\left(\frac{x^5-32}{2-\sqrt[3]{x+6}}\right)$

$\frac{\sin\left(-3x\right)}{\sin\left(2x\right)}$

$x^2+2x+35$

$\int\sqrt{81-144x^2}dx$

$\left(3x-7y^2-4z\right)+\left(-5z+4y-7x\right)+\left(-3y+4z-9x\right)$