$1-7r-5+4r-3r-5$

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

$\sqrt{56x^5y^3}$

$\frac{-3\cos\left(x\right)\sin\left(x\right)}{8}-\frac{\cos\left(x\right)\sin^3\left(x\right)}{4}+\frac{3x}{8}$

$\left(x^{\frac{3}{4}}y^{\frac{2}{3}}z^{\frac{1}{2}}\right)^{12}$

$x+\frac{2x}{x+1}=\frac{10x+18}{x+1}$

$\int\:x\:\cos\left(2x+1\right)dx$