$2\left(x-1\right)\ge x+3$

$ex^{-x}$

$\lim_{x\to0}\left(\frac{\tan\left(9x\right)+\sin\left(10x\right)}{x}\right)$

$2x^2\:and\:3x^2$

$\lim_{x\to\frac{\pi}{2}}\left(1+\cos\left(x\right)^{3\sec\left(x\right)}\right)$

$\int\frac{\left(v+1\right)^2}{\sqrt{v}}dv$

$e^{\ln\left(148\right)}$