$\left(1+x\:2\:\right)+x\:2\:+1$

$\left(4x^2-2x-3\right)\left(4x-1\right)e^{\left(4x^2-2x-3\right)}$

$\int8t\cdot e^{-0.2t^2}dt$

$\log\left(x-8\right)+\log\left(x+2\right)=\log\left(8-x\right)$

$\lim_{x\to\infty}\frac{4x-3}{2x+3}$

$121x^2-144w^2$

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