$\left(u+3\right)\left(2u-5\right)\left(6u-1\right)$

$\left(x-1\right)\frac{dy}{dx}=y$

$\left(r-3\right)^2\cdot\left(r-2\right)^2$

$\left(1.2\cdot10^{-8}\right)\left(9.0\cdot10^9\right)$

$\lim_{x\to\infty}\frac{x-\arctan\:\left(x\right)}{e^x\:+\:4x}$

$200x-x^2=0$

$\int\frac{1}{\left(x^4+2x^2+1\right)\:}dx$