$6r+3$

$2m\left(3m^2-m-5\right)$

$m^2\left(300x+100y\right)-9n^2\left(3x+y\right)$

$\left(9a^3\right)\left(4a^2+8a-1\right)$

$\int_{\frac{u}{v}}^1\left(x\right)dx$

$\frac{1+\sec\left(a\right)}{\frac{1}{\cos^2\left(a\right)}+\sec\left(a\right)}$

$\:\left(-8\right)\:-\:\left(-4\right)\:+\:\left(-6\right)\:-\:\left(+2\right)\:-\:\left(-9\right)$