$\left(12\right)\left(3\right)\left(-4\right)\left(-5\right)\left(2\right)$

$\int\frac{e^w}{\left(e^w\:-1\right)\left(e^w\:+\:4\right)}dw$

$\left(x^3+10\right)\:\left(x^3+13\right)\:=\:\:\:\:$

$\lim_{x\to-\infty}\left(\frac{6x-4}{3x+1}\right)$

$\int e^x\left(x+2\right)^2dx$

$.3\int_0^{\infty}\left(e^{\left(-.3x\right)}\right)dx$

$\frac{\left(-2\right)^1}{1}$