$\int_6^{-1}\left(x+5\right)\cdot\:e^xdx$

$\left(3-b\right)^2=9+b^2$

$\:+4\:-\:7\:-8\:$

$\lim\:_{x\to\:1}\left(\frac{w^2+w-2}{\left(w-1\right)^2}\right)$

$2\pi\int_0^1\left(e-e^y\right)\left(2+y\right)dy$

$\sqrt{\left(2\right)^2+\left(4x\right)^2}$

$\int\frac{x+4}{x^2+8x+17}dx$