$\int\:\left(x^2-2\right)\sqrt{\left(x^2+1\right)}dx$

$6a-7=2a+1$

$\int_0^n\left(1-\frac{x}{n}\right)^ndx$

$\int\:\frac{3x^3-5x^2-22x+48}{\left(x-2\right)x\left(x-6\right)}dx$

$\left(x\:+\:7\right)\left(x\:-\:8\right)\:$

$\frac{x}{x^{2}}+\frac{y^{2}}{xy}$

$\frac{x^3-x}{x}-\frac{\log\left(\sqrt[3]{10}\right)}{\left[\pi\right]^{-1}}+\frac{x^2-1}{1-x^2}$