$\frac{x^5-4x^3+x-1}{x^2+1}$

$\left(\frac{1}{\:9}a^2b^3+a\right)\left(\frac{1}{6}a^2b^3-a\right)$

$-9+-68+17+8+-44$

$\left(mn^2+y^6\right)^4$

$\frac{3}{4}=\frac{x}{20}$

$\left(1-x^2\right)\frac{dy}{dx}=2x+xy$

$\left(1-\sin\left(beta\right)^2\right)\sin\left(beta\right)$