$-14\cdot\left(-20\right)$

$\lim_{x\to\infty}\left(\frac{5}{2}\right)^x$

$\frac{2x+1+\log\left(4\right)}{\log\left(4\right)}=\frac{log\:43}{log\:4}$

$\frac{d}{dx}\left(\left(8x+4\right)\left(2x-9\right)\right)$

$\int\left(x-2\right)^22xdx$

$\left(4-2y\right)^2$

$8m^2-n-n+2m-5m^2$